It seems the Steam store is having problems at the moment, frequently showing 0 games available on the Mac and not showing anything under New Releases & Top Sellers, this doesn’t however change the fact that Counter-Strike: Source is now available.
It’s a fairly large download, much more than I expected, over 1.5gb, as I would have expected several shared resources with other Source based games.
This seems like a fairly big title so at the moment I am not expecting anything more on the store, even though this doesn’t appear under the homepage of the Mac section yet either.