Do you know any good MMOTSG or MMOFS games?

I used to play a game called tactics arena online, it's one on one tactical battles, similar to shining force and the fire emblem series, grid- turn based action using fantasy themed units, it's not massively multiplayer but there are a couple of thousand who regularly play.

I played a free trial of something on fileplanet; a space sim but I can't for the life of me remember what it was. But Eve online is probably the best one for space sims.

I am looking for MMOTSG with real-time combat, something similar to Navy Field, Command & Conquer: Sole Survivor, or Mech Commander.

Eve Online is not exactly an MMOFS because it's a click and point game. I tried it for a month or two during the beta-test.

A really good MMOTSG is World War IV at http://ww4.gamesoda.com. It's free to play with no downloads.