Lightroom 2.0 Beta is open to the public. If you are not currently a registered Lightroom user (I'm not) then the beta will work for 30 days. If you are a Lightroom user or are invited by a Lightroom user, the beta will work for the entire beta period (thru August 2008). So, if there's a registered Lightroom user out there who is willing to send out an invite, please let me know! (The invites are encouraged and supported by Adobe. This is not in any way piracy).
Here is a link to the beta info:
Adobe Labs - Adobe Lightroom 2.0 Beta
Here is a link to the place to invite others if you are registered:
Adobe Labs - Lightroom Beta Invitation
As a registered owner of CS3, I'm a bit bummed that they didn't extend Lightroom invites to us...but I figure maybe someone here has it. I tried beta 1.0. It was slick, but was really slow with a large number of images like I have. I'm hoping 2.0 is faster.