If you are using my $log$ substitution/keyword expansion for your source code with TFS, I have good news for your: I have upgradred my project to VS2010 
The latest download can be found here:
$log$ / Keyword Substitution / Expansion Check-In Policy (TFS – LogSubstPol)
We are using an earlier version of LogSubstPol under VS2008 (and it’s great!). We are about to move to VS2010 clients, but need to use both VS2008 and VS2010 clients in parallel on the same PCs for a while. The TFS server is 2008 and is not being upgraded.
Do we need to use the new version for VS2010 clients? If we “Install downloaded custom components” on the same PC under both VS2008 and VS2010 clients, will that set up everything correctly including both registry values?
We want to start using the LogSubstPol, but since we have already started the project we would like to get also all history of the revisions in the sources. Is it possible to force the tool to read all revisions history and insert it in the sources the first time?
I saw in the Wish List/Todo entry already that you defined what you wanted to do with the history: $importlog$. Is there any plan to implement the $importlog$ any time soon?