Have not had time to do much with the new Lightroom 3 version (beta 2). However, one of the improvements is obvious from--literally--the very beginning: the import module is now working very stable, dependable and fast. Its instability was the major drawback of beta (1) to me. On the other hand, the more intuitive 'workflow-like' import interface was one of the major improvements of LR3 over LR2 for me, so it was important to me that it works well.
The beta 2 that I downloaded came in my native Dutch language, while beta 1 had been in English. I work as easily in English as in Dutch but still there was a fleeting moment of joy when I realised the change of language. Long live Onze Taal ;-)