I have collected many free training resources here for people to learn about SQL 2005 Reporting. This list includes various levels of materials including some introduction and advanced topics. Please let me know if links don't work or you have new links for me to add on. I'll update them in future posts.
Information Web Portal
Web Portal
SQL Server Reporting Services
http://www.microsoft.com/sql/technologies/reporting/default.mspx
MSDN Reporting Services
http://msdn.microsoft.com/sql/bi/reporting/default.aspx
TechNet Reporting Services
http://www.microsoft.com/technet/prodtechnol/sql/2005/technologies/rptsvcs.mspx
Books Online Reporting Services
http://msdn2.microsoft.com/en-us/library/ms159106(SQL.90).aspx
General SQL 2005 Reporting Services
MSDN Webcast
Introducing Reporting Services for SQL Server 2005—Level 200
http://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032263305&EventCategory=5&culture=en-us&CountryCode=US
Tutorials
Reporting Services Tutorials
http://msdn2.microsoft.com/en-us/library/ms170246.aspx
Virtual Labs
SQL Server 2005 Reporting Services
http://go.microsoft.com/?linkid=4267440
WebCast
Intro to SSRS 1 (RS Overview)
http://msevents.microsoft.com/cui/webcasteventdetails.aspx?eventid=1032282905&eventcategory=5&culture=en-us&countrycode=us
Intro to SSRS 2 (End user push reports)
http://msevents.microsoft.com/cui/webcasteventdetails.aspx?eventid=1032283016&eventcategory=5&culture=en-us&countrycode=us
Intro to SSRS 3 (Report Builder)
http://msevents.microsoft.com/cui/webcasteventdetails.aspx?eventid=1032283022&eventcategory=5&culture=en-us&countrycode=us
Intro to SSRS 4 (Advanced Reporting)
http://msevents.microsoft.com/cui/webcasteventdetails.aspx?eventid=1032283046&eventcategory=5&culture=en-us&countrycode=us
Intro to SSRS 5 (RS Extensibility)
http://msevents.microsoft.com/cui/webcasteventdetails.aspx?eventid=1032283054&eventcategory=5&culture=en-us&countrycode=us
Intro to SSRS 6
http://msevents.microsoft.com/cui/webcasteventdetails.aspx?eventid=1032283061&eventcategory=5&culture=en-us&countrycode=us
eLearning
Updating your Reporting Skills to SQL Server 2005
https://www.microsoftelearning.com/eLearning/offerDetail.aspx?offerPriceId=66793
TechNet Webcast: Overview of SQL Server 2005 Reporting Services (Level 200)
http://msevents.microsoft.com/cui/webcasteventdetails.aspx?eventid=1032273491&eventcategory=5&culture=en-us&countrycode=us
TechNet Webcast: Introduction to SQL Server 2005 Reporting Services (Level 200)
http://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032289973&EventCategory=5&culture=en-US&CountryCode=US
Advanced Reporting Services
MSDN Webcast: Advanced Reporting with SQL Server 2005 Reporting Services (Level 200)
http://msevents.microsoft.com/cui/webcasteventdetails.aspx?eventid=1032271246&eventcategory=3&culture=en-us&countrycode=us
MSDN Webcast: MSDN Events Preview: End to End Data Reporting with SQL 2005 (Level 200)
http://msevents.microsoft.com/cui/webcasteventdetails.aspx?eventid=1032267718&eventcategory=5&culture=en-us&countrycode=us
TechNet Webcast: Advanced SQL Server 2005 Reporting Services (Level 300)
http://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032289991&EventCategory=5&culture=en-US&CountryCode=US
Ad-Hoc Reporting - Report Model and Report Builder
TechNet Webcast: Introduction to SQL Server 2005 Report Builder (Level 200)
http://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032289994&EventCategory=5&culture=en-US&CountryCode=US
Video
Developing a Model for Report Builder and End-user Report Authoring
http://msdn.microsoft.com/msdntv/episode.aspx?xml=episodes/en/20050531SQLServerCC/manifest.xml
SQL Server 2005 Report Builder
http://go.microsoft.com/?linkid=4540578
MSDN Webcast: End-User Ad Hoc Reporting with SSRS (Level 300)
http://msevents.microsoft.com/cui/webcasteventdetails.aspx?eventid=1032273699&eventcategory=5&culture=en-us&countrycode=us
MSDN Webcast: Advanced Report Authoring with Report Designer (Level 300)
http://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032273595&EventCategory=5&culture=en-US&CountryCode=US
MSDN Webcast: SQL Master Class: Using Report Builder (Level 200)
http://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032289665&EventCategory=5&culture=en-US&CountryCode=US
Report Viewer Controls
MSDN Webcast: Intelligent Reporting: Using the Visual Studio 2005 Report Viewer Controls (Level 200)
http://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032284445&CountryCode=us&culture=en-us
Virtual Lab
SQL Server 2005 Report Viewer Controls
http://go.microsoft.com/?linkid=4540581
Management and Configuration
TechNet Webcast: SQL Server 2005 Reporting Services: Management and Configuration (Level 300)
http://msevents.microsoft.com/cui/webcasteventdetails.aspx?eventid=1032273593&eventcategory=5&culture=en-us&countrycode=us
SQL 2005 Reporting Service Upgrade from Reporting 2000
http://go.microsoft.com/?linkid=4872476
Integration and Others
TechNet Webcast: Design Reports in Microsoft Office and Deliver Using SQL Server Reporting Services (Level 200)
http://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032278527&EventCategory=5&culture=en-US&CountryCode=US
Books and References
Book
Microsoft® SQL Server™ 2005 Reporting Services Step by Step
http://www.microsoft.com/MSPress/books/9153.asp
Pro SQL Server 2005 Reporting Services
http://www.amazon.com/SQL-Server-2005-Reporting-Services/dp/1590594983
Microsoft SQL Server 2005 Reporting Services 2005
http://www.amazon.com/Microsoft-Server-2005-Reporting-Services/dp/0072262397/ref=pd_sim_b_2/102-1519373-5772134?ie=UTF8
Professional SQL Server 2005 Reporting Services
http://www.amazon.com/Professional-Server-2005-Reporting-Services/dp/0764584979/ref=pd_sim_b_5/102-1519373-5772134?ie=UTF8
Microsoft SQL Server 2005 Reporting Services
http://search.barnesandnoble.com/booksearch/isbnInquiry.asp?z=y&EAN=9780672327995&itm=13