You can download it now from the SVN repo, but expect some broken stuff. I'd recommend developers to at least install it to get an understanding of the changes and update their stuff.
Yeah, I've heard you advise that before....and I've started to go down that road even, but unless I'm missing something, it looks like I was going to be there for hours downloading one file at a time....Dear Lord...That's a lot of files! Why isn't there like an optional download button to snag all the files at once?
You need to use a Subversion client to download the files from the repo. Check out http://www.boonex.com/forums/topic/Developers-Links.htm for more information.