I have been searching the web for a clean solution on how to migrate our 2010 tfs collections to our new tfs 2012 server, but no luck. May someone please assist with the ste
You can move a collection at a time using the detach option in 2010 and attach it back to 2012 using the attach option there.
See http://msdn.microsoft.com/en-us/library/dd936138(v=vs.100).aspx