*.dsk, *.identcache, *.local, *.~*, *.drc, *.map
You may also want to include *.ddp in this list if you don't use these diagrams.
If you don't use Together then you could also exclude these files: *.tgs and *.tgw.
For a deeper, more thorough exclude list, try the following:
Some may prefer to store binaries in StarTeam. If so, remove the first two extensions from the list.