[supermeatboy] Supermeatboy on steam for linux?

[Fredrik Fyksen Lund]

With steam released for Linux, and the "Steambox" rumored to come with 
Ubuntu preinstalled it would be awesome to have Supermeatboy for Linux 
available.

It looks like I'm not alone thinking that:
http://steamcommunity.com/app/40800/discussions/0/864951475490355056/
http://steamcommunity.com/app/40800/discussions/0/810924134054070369/

What is in the way of getting it on Steam? SMB seams pretty stable on 
the Linux side of things.

Another problem with not having it on steam for Linux is that there is 
no legal way for Linux people to get the game. The Humble Bundle "long 
gone", and the supermeatboy page just links to the Steam site.

Ps. Hoping for answers.
PPs, sorry for my English, 2nd. language.