as far as I know the only requirement is that you have to have Mansion Poker

they are under the "Special" tab
Wed trny is now full (3000 players)

if you go on, Thursday afternoon (est), you should see the registration open for the AVALANCHE Freeroll


also note: there are 2, daily $500 freerolls ( the morning one never fills)
a weekend freeroll for $1000 freeroll and a mnthly $2,500 freeroll
which there are no requirements (rake, points etc, to play)