I haven't downloaded it yet, but there's a nice little preview on LL
http://www.luminous-landscape.com/reviews/software/lr-3-beta.shtml with the link to dl also.
There is quite a bit more to LR than just the Develop module, but even there it appears from the preview that they improved it. I've used their betas from the beginning and by the time the actual version appears, I'm comfortable with it. Then--they have added 'goodies' after the beta--like the gradient and brush tools which were great additions. The print module has been improved also. I'm looking forward to it--each upgrade has been well worth it and I'm looking forward to trying this one.