For those of you looking into the 360, there's a mech game called Chrome Hounds coming out that seems amazing.
6 classes of mech (scout, commander, sniper, heavy gunner, defender and assault) with multiple types of each, 300+ parts to customize everything down to the individual look of your mech, online persistent universe with 3 factions vying for control, etc.
For more info. check out the url in my sig. We've started a clan and are looking for experienced pilots/mech strategists.
Experience with past mech games ups your initial rank.
After that we have forums to participate in, a site that supports user-submitted news, and we're using a freeware program called Mega Mek for tactics training. Finally we have some get togethers on Xbox LIVE for other games out right now that people can attend to meet their teammates.