Future_Suture: I am a part time Linux user who enjoys booting Linux Mint KDE via a USB stick over booting Windows 7 on his laptop. Strangely enough, booting Linux Mint KDE is also faster on the computers at my university as opposed to waiting for Windows 7 to start up, but that is a story for another time!
I could see myself becoming a full time Linux user if my favorite digital distributor started distributing Linux versions of the games we love so much. My favorite game, Heroes of Might and Magic 3, has a Linux version which GOG doesn't provide unfortunately. Unreal Tournament 2004 and Neverwinter Nights have Linux versions as well, but are nowhere to be found on GOG. Practically every indie game these days has a Linux version, but does GOG provide them? No!
People far more knowledgeable than I seem to provide easy solutions and even offer to help GOG out in the process of introducing Linux. Now that Steam is coming to Linux, I would hate for GOG to fall behind when it is my preferred digital distributor. I just hope things change soon.
Welcome aboard the wagon. In case you hadn't noticed many game specific forums will have someone disusing if a game is working using wine or not. If you are interested in a game and don't see one ask the question, "does it work with wine," and see what you get. There are also some lists on the forums trying to log which games work.
And in the case of UT2004 there are a few threads in the UT forum about getting the GOG version to work as a Linux native. I just reinstalled my Disc copies, and like always, have had annoying issues swapping discs. It almost sounds easier to rebuy the GOG version and convert it which sounds like it boils down to using wine to extract the files and write the CD key so you can find it, and then copying over the game using the most recent Linux patch.
I've been surprised by how many games I have running just fine these days from GOG. Not that they all do.