Yea, we're in the middle of moving a bunch of files around and re-doing the build in SVN head right now. It's going to be a few more days before it's stable again.
If you'd like to use SVN head for PHP files, just take the files from src/php and copy them into your project for now. Unless you need the new JS files, then you'll need to wait a few more days. Sorry.
We are going to be pushing the files so they can be accessed externally (JS files, modules, etc) but we don't yet have that ready. Looks of big distribution improvements in the works and will be available in the upcoming 2.1
Jeff
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Jeff Haynie
http://blog.jeffhaynie.us