I guess perhaps the most interesting is "Uncharted: Drake's Fortune", registered by SCEA last August. I haven't seen mention made of it before, it may have only appeared online recently. I think it's interesting because it seems like a perfect fit for Naughty Dog's untitled game. Drake's Fortune is likely a reference to Sir Francis Drake, the famous English navigator...he had some adventures in the Caribbean, and during that time had to abandon a treasure of silver. IIRC, Naughty Dog's trailer makes references to lost treasure and maps in and around that locale..
A few others - in December they (re)registered Motor Toon Grand Prix. If they're protecting it again it would seem to confirm their intentions to sell the game again i.e. via PSN, as Phil Harrison has previously hinted.
SCEE trademarked this in January:
With this description:
Also trademarked what is probably the logo for the new eyetoy..one wonders what eyetoy 2 was..
Providing access to gaming, digital music and/or video web sites; providing wireless transmission of music, video and games, via the Internet and via communications networks; uploading and downloading of music, video and games, via the Internet and via communications networks; providing on-line bulletin boards for the transmission of messages among computer users concerning games, music and videos; distribution of computer software relating to music, video and games over local or global communications networks; communication services in the form of matching users for the transfer of music and video recordings via communication networks; information, advisory and consultancy services relating to all the aforesaid
That's about all the interesting stuff, as far as I can see.