Mech Topics of note

Hawken (PC, free to play, open beta)

Hawken Vids

Release date trailer - 12/12/12

Beginners guide to hawken (off-site link)

Steel Battalion: Heavy Armour (xbox360k, released) 

STBHA

Demo Talk

Armored Core V (xbox360/PS3, released)

Reviews

Operator know your role.

garage

tips tricks

scrap part locations

paint jobs

Mechwarrior: Tactics (browser based, closed beta)

the BETA

Star Citizen

Star Citizen (space sim not mech game but its gotta go somewhere)