New version released July 17th 2009.
Created attachment 203956 [details]
Here's a quick'n'dirty ebuild I did a couple of weeks ago.
It uses EAPI2 for the SVN webdav dependency, the "nowebdav" flag in SVN seems to be gone. Also, there are some SRC_URI tweaks and a tweaked patch name.
Now in portage; please bang on the neon dav backend.