I have upgraded to Lightroom 4 and wished Adobe had made this available in 2 versions:
Normal - Single Catalog
Enterprise - Shared Catalog
I am very happy with LR4 and it does perform better than the BETA. The catalog upgrade was seamless and I am finding that re-visiting post-processed photos and switching the updated develop module does seem to bring more detail out of these photos.
Looking forward to testing my plugins and see if they work under LR4 or there is going to be a flurry of software updates from me over the coming weeks.
I am a Microsoft Dynamics AX programmer for Paspaley Pearls (and also the SharePoint Administrator). I also run Diverse Systems Consulting. Lately I have been specializing in Dynamics AX but am diverse across many languages, systems and applications.