So far Bloodmoon, the second Morrowind Expansion, is pretty good. HomeWorld 2 should be coming out this summer, IIRC. Unfortunately DX2 was pushed back to October. Enter The Matrix isn't bad. PlanetSide seems awesome judging from what I've heard from a person who was involved in the beta. Golden Sun 2, which came out earlier this year is very good.

Edit:

Merged, pruned