[embersdev]

This is the best answer, but even if you didnt want to go through this trouble... just create a new repo in git, lock down svn and assume from that day on, if you need to see older history, go look in svn. Over time the need to look at svn for history will dwindle.

[mikewarot]

That sounds like a really bad idea. Eventually you'll consider the SVN stuff to be lost, and it'll be impractical to import it later. As all the responses show, that history has real value.. you don't want to lose it.