I know that many "Linux gamers" scoff at the prospect of official support for running games under Wine... I don't. I think GOG in particular should jump at the chance to partner with the PlayOnLinux project and some the numerous other projects that allow older games (and some new games) to run via some emulation layer, engine rewrite, or reimplementation of Windows library/runtime support. Judging from what I have seen Wine do these days (which is by far the most fickle of methods above), I would not be surprised if a year of work or so could get %90+ of the GOG library running with near perfect quality on GNU/Linux systems. As a point of reference, running the recent Valve ports for GNU/Linux are consistently less stable than running under Wine (which works nearly perfectly) and that is without any kind of PlayOnLinux configuration script magic.
Note that there is no reason that I can see that this wouldn't simultaneously make the same software available for OS X and any other system that can run Wine.
> I went with Linux to avoid needing the willpower to not play games and get on with learning / working ;-)
heh