I had a customer requirement of implementing of implementing document rating / feedback functionality 6 months back. That time, we did not have any guidance for this. We did a custom development and achieved the feedback functionality for document library. I keep getting lot of queries in SharePoint forums for how to achieve this functionality.
Recently I came to know that there is a codeplex project for the same. This would be really helpful and please check this out.
http://www.codeplex.com/spdocrating
Repatedly i'm seeing this question raised in MSDN SharePoint forums asking for what level of integration is possible between MOSS 2007 and Project Server. We can deploy Project Server to an existing MOSS environment, deploy MOSS 2007 to an existing Project Server environment and deploy both the MOSS and project server together to a new environment. All of these are possible.
The technet articles cover them in detail
Deploy Project Server 2007 to an existing deployment of MOSS 2007
http://technet.microsoft.com/en-us/library/cc197558(TechNet.10).aspx
Deploy MOSS 2007 to an existing deployment of Project Server 2007
http://technet.microsoft.com/en-us/library/cc197594(TechNet.10).aspx
Deploy Project Server 2007 & MOSS 2007 to new environment
http://technet.microsoft.com/en-us/library/cc197677(TechNet.10).aspx