An interesting training exercise would be to port it to BSD (unless it already works on there) although doing that solo would require more time than I have.
SFML should work on BSD, except for the joystick part which is a little bit different from regular Linux, and undocumented.
If it works on osx, it should work on bsd (minus the cocoa code) since osx is derived from bsd. I'd like to offer my assistance in porting 2.0 to osx. I know this has had a lot of postings, and I know I can't do a complete port, since I'm blind, and using the Xcode tools is damned near impossible for me, but I'm an excellent code hacker, and I've ported several packages from other unix-type oses (and dos) to osx in the 5 years I've had my mac, so as long as you don't ask for graphical work, I can do just about anything else, including compiling final releases (I have both intel and ppc machines, laptops, minis and imacs (we're a mac family here) and I have an apple Developer Id, so asking support questions of apple isn't a problem. If someone else can build the gui components of the port, (buttons, menus, views and the like) I can handle the code behind them with only minor difficulty. I'm not sure my skills are up to porting something as complex as sfml, but I sure don't mind giving it a shot, perhaps if someone else who has a mac could do the graphical parts, I could handle the rest (possibly) I know that's not exactly what you were after, but if it will get the port done faster, I'll do what I can to assist.
Only thing is, no snowleopard machines yet (gotta upgrad the memory in my macbook first) but we do have both tiger and leopard machines here.
If someone could point me to the source that needs ported, I can certainly take a crack at it, who knows, maybe I can get some of it working.
hth.