Recently, I was building a process the other day and ran into a need to copy a file. The TFS2010 builtin CopyDirectory wasnt suitable, and RoboCopy extension seemed like so much overkill... I ended up just doing an InvokeProcess to an Xcopy
(in hindsight, perhaps not the best - but it works)
I've come across something that would have fit my need perfectly had it been part of the extension pack....
Perhaps someone can talk to Jason about allowing it to be merged into the next release??