[niels_olson]

xetex is available as a MacPorts port. Works fine for me on 10.6.2. I think it got installed as a dependency, actually. Possibly for MathML.

[neilc]

Although note that MacPorts currently has TexLive 2007, which is a few years old. Packaging TexLive 2009 is in the works, but will take some doing.