I stumbled upon the Wine database and found that some people have the editor "working" in Linux now (link here). Pretty interesting, although I wonder whether the "Programs in Directx render not display UI obiects" means at runtime or in the editor.
Even so, it looks like people can at least do some work on their games in Linux now (maybe even on the Pandora? <img src="smileys/smiley17.gif" border="0" align="middle">)