Planetside is freaking awesome fun. Especially when there are a lot of people online. Theres no FPS remotely like it. Think of playing Tribes, with 300 other people.
It's just to bad that theres nothing really to do besides the strait on PvP. You can change your certs easy enough, but the fun only lasts a few months, if that.
A Starcraft MMOG will be huge no doubt, but I can just see WoW instanced PvP garbage in Starcraft already.