This online compiler is a GREAT idea.
I know from past experience that there are commercial ARM compilers for Windows, but they're not consumer level at $1500 or more and I can't stand the idea of running a Linux box just to have access to a compiler.
I'd do this myself, I have about 7 or 8 fast machines, but I just moved and no longer have DSL.
I *do* have a host in Silicon Valley on a fast connection. No guarantee on how long it will be up, though. We could potentially use it for testing and to get some sort of setup procedure in place.
I wouldn't mind opening up a directory for this purpose as long as the hits and processor time don't go through the roof.
Let me know.