Just to be clear, the currently live 3.30 firmware update for the PS3 does not add 3D functionality, however it does prepare the system for it.
The main focus of the update, according to the EU Playstation blog, seems to be trophy enhancements:
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Trophy enhancements –- Now you can more easily sort trophies in the [Trophy Collection] and [Comparing Trophy] sections. Sorting can be done with [Trophy Collection] in the [Game Category] and also when comparing trophies with your friends in the [Friend Category]
* Trophy Folder (Title List) can be sorted by game name/ by title according to the date in which you earned your last trophy (ascending/descending)
* Add-on list (Group list) can be sorted by original/the date in which you earned your last trophy (ascending/descending)
* Trophy list can be sorted by original/trophy name/grade/date of obtaining the trophy (ascending/descending)
Not a ground breaking update, but it seems most of the good stuff is behind the scenes.