While Steam for Linux is currently being developed, Linux users can already today use the digital game distribution service Desura. Desura is very similar to Steam and offers a very extensive collection of games for Linux.
However, in contrast to Steam, Desura's game list includes both commercial and free or even open source games. Recently Desura client itself was released under a free license.
The service supports social functions such as chat, groups and blogs and offers a whole range of different tools for developers such as tools for modes development, an API for games or alpha and beta delivery of the games.
The release of Desura for Linux is a big step for the Linux gaming brings a lot of new games for the platform.
Desura is definitely a must for every Linux gamer - give it a try!