<http://utsl.gen.nz/talks/git-svn/intro.html> has some interesting info about svn->git conversions (and svn vs. next-gen distibuted systems in general).
Also, out of curiousity I tried doing git-svn clone --stdlayout http://svn.open-mpi.org/svn/ompi/ and it seemed to work fine (git-svn is part of the main git distribution). The only obvious thing missing is that you would probably want to set up an author file for a real conversion, so that you get real names instead of just "jsquyres". It took a while to run, mostly because it has to grab each svn changeset one by one. The interesting thing is that a checkout of the current ompi tree seems to be about 37 MB, while .git directory of my repository, which has the entire history of all branches of the svn repository plus 1.6MB of svn metadata is 36 MB. And git can do fun stuff like git diff v1.1..v1.2 in half a second (it generates a 274858 line diff). It can generate the full 116320 line (11164 commit) log of the trunk in .3 seconds. Jeff, if you want to see the repository, it is in /data/home/roland/ompi.git Feel free to make it available however you want (it's your data of course). - R.