I just downloaded Adobe's new beta for Lightroom and I just loaded my current wedding from last weekend and I just have one word.. WOW!!! I've been going through the tools in the development module and they added a new one (haha just one right) Uh.. have you downloaded it yet? you really need to work through this with me... I'll wait while you go get it... Ok I can see that you're back.
Well if you don't want to take a chance on a beta, let me tell you I have only tried a few features in the develop module.
Get this... look at the picture and under the histogram you will see four new tools. (expand the picture I've included) The first three were there but under the working window. The new tool is is the 4th one on the right. You click on it and the menu options expand below it. You now have the ability to paint in an exposure mask to your image. You can be real selective with the amount of the exposure and you can feather it.. I may never have to go back into photoshop again. This is the coolest improvement I've ever seen!
Uh, you can probably tell that I LOVE this addition to LR... You'd be right.. I'll let you know if any other changes are as good as this... I haven't even looked at the preview/web or print sections yet. Stay tuned and I'll see if there are any more cool changes in the beta.

Jeff