I have been compiling links to current documents/links/articles on Mcirosoft related sites regarding Microsoft Office SharePoint Server 2007 Search. I am sure there are more links out there, but this is a good list to start with:

• MOSS 2007 Search Overview in SDK: http://msdn2.microsoft.com/en-us/library/ms495418.aspx
• Searching in MOSS in SDK: http://msdn2.microsoft.com/en-us/library/ms497338.aspx
• Configure MOSS Search Service at TechNet: http://technet2.microsoft.com/Office/en-us/library/b28ba53d-a3e8-440f-9fcb-f592d858894a1033.mspx?mfr=true
• Plan for Performance and Capacity in MOSS at TechNet: http://technet2.microsoft.com/Office/en-us/library/eb2493e8-e498-462a-ab5d-1b779529dc471033.mspx?mfr=true
• Plan MOSS Search at TechNet: http://technet2.microsoft.com/Office/en-us/library/2f237fcb-d8c5-4ccc-943b-25fb361f294d1033.mspx?mfr=true
• Security Considerations for Search in MOSS at TechNet: http://technet2.microsoft.com/Office/en-us/library/b28ba53d-a3e8-440f-9fcb-f592d858894a1033.mspx?mfr=true
• TechNet Webcast: In Depth Look at MOSS Search: TechNet Webcast- An In-Depth Look at SharePoint Server 2007 Search Technology (Level 200)

Hope that helps
Mike