But only if 'you' happen to be a pretty experience Linux user. Well, you don't have to be an experienced user, but that's what Valve would prefer!
Valve has been discussing the need to develop Steam for Linux, partly in response to the new Windows 8 OS. Gabe Newell has been pretty forthwith in his criticism of Windows 8 and Steam for Linux is, in part, a response to this.
You can head here for more direct information on how to register if you happen to be a Linux user.