According to Gerd Knops:
None of them are really well supported in TM, but I prefer command line anyway...
Depends on your meaning of well supported but AFAIS(ee), there are TM modules for Mercurial, SVK, Darcs, and so on.
to only submit when the code at least runs, but want finer grained control. So I started using Darcs, as it is easy to use Darcs on the same sources. To bad development on it seems to have stopped. It
Oh, news to me, thanks. Too bad :-(