> Is it possible/likely that some linux program will show up using
> MMX features that someone will want to run under emulation?

MMX just reuses the FP registers.  I'm going to assume you meant:

> Is it possible/likely that some linux program will show up using
> SSE features that someone will want to run under emulation?

It's possible, but I haven't heard of one yet; a more likely candidate
would be some sort of windows software using the SSE extensions which
would want to run under one form or another of emulation..

					- Bill