Any good Subversion virtual appliance recommendations?

You should consider this, it is really ZIRRO friction and it integrates well in various scenarios.
Not to mention it is free of charge.

http://www.visualsvn.com/server/

Cheers,
Dragos

I would simply go with installing SVN, and using the SVN Daemon, and completely ignoring Apache. There should be no appliance needed. Very simple to install, very easy to configure. Just take a vanilla windows/linux box and install the subversion server. It'll probably take all of 1/2 and hour to set up.

No need to use an appliance, use the free BitNami one click Subversion installer (supports Linux, Windows, Mac...)