Just finished installing my Lightroom 3 upgrade, I upgraded from V2.6. Let me say... WOW!! I am sooo pleased with it. One particular feature i love is the 'Noise Reduction'. Because i use the kit lens and dont have the greatest DSLR Body, my images are offen let down by a noisy background. With Lightroom 3 i am able to illiminate around 90% of noise in seconds.
As im still finding my way through all the new features of Lightroom 3, it'd be awesome if others who have also upgraded could help by pointing out some of their positive experiances with the software. Share the Love!!