XLibe is pretty dang cool. I’m not sure which “frontend” currently in progress is the more useful for Haiku, however. In terms of “open” applications, there’s certainly a good few I use regularly that are GTK native - but ones I would want on a Haiku desktop are fewer. Evolution, GIMP and Inkscape are probably the most notable. Wine is probably the more appealing to me, given how much upstream effort is currently going into it by companies such as Valve. So, a native Wine is also interesting - but Xlibe has clearly made that happen quicker than it might have otherwise.
Though this talk of X and Windows now makes me think about X Forwarding and RDP, and wanting a remote-desktop-to-Haiku system, since it’s something I use heavily, and the main reason I use Windows at home and work.
R3, maybe for that one. 