http://utforums.epicgames.com/search.php?searchid=1360073

That guy's posts seem to be something to keep an eye on.

Wow... that WAS a link to Mark Rein's posts... he's VP of Epic or somesuch. 
http://utforums.epicgames.com/forumdisplay.php?f=21 - there's the forum
http://utforums.epicgames.com/showthread.php?t=578203 - there's a post by Mark Rein about the upcoming beta - I guess they don't like linking to the 'show all posts by' page.  Sorry.