This is similar to what the Xming project does. There is a public version available for everybody. It works and it's cool (much better than fiddling with Cygwin/X), but it doesn't have the latest developments. To get the newest version you have to donate at least £10 and you get access to the newer versions, which include the latest and greatest (upcoming Gallium3D, better support for W7/Vista, 3D acceleration, whatever).
By the way, the latest reports on the LLVM/Clang effort in FreeBSD indicate that most people can use it to compile world without a problem.
First off, this thread is over a year and a half old.
That being said, I noticed the clang website still lies about GCC.
"GCC is licensed under the GPL license. clang uses a BSD license, which allows it to be used by projects that do not themselves want to be GPL."
Compiling something with GCC does not mean that what you compile has to be licensed under the GPL. Only derivative works of GCC itself would have to be licensed under the GPL, a compiled project is not a derived work.
Compiling something against GNU libc does not mean that what you compile has to be licensed under the GPL. GNU libc is licensed under the LGPL, which does not require software linking to it to be under the same license.
Opera is compiled using GCC and is linked to GNU libc. This is perfectly OK, they aren't violating any licenses in doing so.
Since clang is basically Apple and BSD stuff, it makes sense that their religious hatred of the GPL would factor into this, but outright lies are just offensive. It would be more honest to say "We hate the GPL because it doesn't let us steal and not give back. GCC is licensed under the GPL. We must NIH our own compiler. EXTERMINATE EXTERMINATE!!!!"
GPL MUST BE EXTERMINATED!!! BSD OPERATING SYSTEMS ARE SUPERIOR BECAUSE THEY HAVE NO CONCEPT OF ELEGANCE!!! USE YOUR SOUND AND VIDEO CARD LIKE IT IS 1999!!! OBEY!!! OBEY!!!