Theme pack updates

Iv’e just installed the 133 themes on a brand new WP3.0 site for testing purposes but 33 (!) of them have already an update.

I understand that these themes have been slightly modified to include avatars and other stuff from the plugins, so let’s make it simple: where can I find a .svn of all the modifications being made to the original themes so that I can first update the themes and then re-code them accordingly? If that doesn’t exist, what about setting it up as a priority? I’d hate to run diff on each single file against the original theme (besides, it wouldn’t be worth the money otherwise).