I got an update for my LR 4.1 RC that was available a month ago. The update triggers a dialogue telling you that you need to either enter a serial number or purchase a full version. The full version is $149!!! Really ??? Is this the average Adobe Inflated Retail Price ? I'll think I'll wait until 1saleaday.com or CNET's Cheapskate offers it as a promo item.
If you owned LR 3 or are a student or academic, you can get the upgrade for around US$75. I personally think it's one of the best graphics/photo programs out there.