Looks like the new version of sitecopy in Squeeze is having problems. I get this error:
sitecopy: Error: Could not connect to server...
I did a quick search and someone else is having the same problem. Doh!
I downgraded to the one from Etch, which requires libneon26, and that works.
Hmmm, I think whatever is wrong here might be due to libneon27, as I'm not able to use svn either!
This might be the problem: Debian Bug report logs - #531338 :: svn: OPTIONS of 'http://...': could not connect to server (http://...)
Yup, needed to update libneon27 and libneon27-gnutls from sid.