As most of you may (or may not) know, the new version of microsoft's C++ compiler, from Visual Studio.NET 2003 comes with both Athlon and P4 optimizations. While it doesn't vectorize like ICL, it's still a step in the right direction.
I've built some binaries with the new compiler for the athlon and the p4. I haven't had a chance to play with them, so you'll have to summarize for me!
lame-p4.exelame-ath.exe