1. I keep finding useful pieces of information on our website which I wasn't aware of, like this SQL Server 2005 Ugrade Handbook http://www.microsoft.com/technet/prodtechnol/sql/2005/sqlupgrd.mspx
2. Norb Technologies have produced a nice tool, Visual Defrag tool for SQL Server which produces a graphical representation of table/index fragementation (and it's compatible with 7.0/2000 and 2005, go here for more info http://www.norbtechnologies.com/default.asp)
3. A new page appeared recently which talks about SQL Server 2005 support on Windows Vista and Windows Server Longhorn. Bottom line, at the moment, is that all editions of SQL Server 2005 with Service Pack 1 CTP are supported on these pre-release platforms. There are as always known issues so I suggest you take a look at the info http://www.microsoft.com/sql/howtobuy/windowsvistasupport.mspx
4. I've ditched Adobe in favour of Foxit Reader. Why? well, it is so much faster to launch PDF documents (I've started using this a lot more in Office 2007 beta due to the Save As integration). Take a look: http://www.foxitsoftware.com/pdf/rd_intro.php
To coincide with the SP1 release..the SQL Server 2005 Books Online April 2006 update is available here: http://www.microsoft.com/downloads/details.aspx?amp;amp;displaylang=en&familyid=be6a2c5d-00df-4220-b133-29c1e0b6585f&displaylang=en
There are loads of new and updated topics, especially for SSIS.
...and was published on 19th April, get it here http://www.microsoft.com/sql/sp1.mspx
The BOL update will follow...