The Gene Expansion for Metal Gear Online is apperently now available from the in-game MGO Shop. Still no prices listed anywhere, which worries me, but you can find the details here.
Metal Gear Online - Gene Expansion
UPDATE: I logged into MGO, to find that I needed to update from v1.01 to v1.10, so after that was done, I went to check the MGO Shop. Turns out its down due to high traffic; a problem that could've been easily avoided if the jut used the PSN. Anyways I did notice some new features with the update. For instance, for your "achievment" like consectutive kills, etc. you now get a little badge to go with it in your stats. The menus are also set up for the Reward Shop and Survival modes, even if you dont have the ability to access them. And theres also a new "Clan Chat" so that you can mingle with your fellow clansmen (that in poor taste?).
I am in the clan "Snipers United", so if you need a headshot, call me. Oh, and I made the rank of Water Bear today, whatever the hell that is... Previously I held the rank of Sloth, aka Most Likely to Die via Headshot. I reached Water Bear by having a "high survival rate", yeah...