I don't know if you know this already but, Lightroom is an amazing program for editing photos! I use it with Adobe Photoshop CS2 for all my editing and love the workflow between the two! Beta Version means Adobe is getting ready to release a new version of the old program but, before they do they have a bunch of smart people try it out and tell them about the things the work or don't work so by the time we get it...all the bugs should be worked out.
The great thing about this is you can download the program for free and trial it for the next couple of months while you're deciding if it's the right program for you! Here's the link to the beta version! http://labs.adobe.com/technologies/lightroom3/
Hope this is helpful!