I know it sounds hokey, but you've just gotta' include Steve Martin's classic "King Tut."

Seriously, how about the soundtracks from the Stargate movies and series? Not the main theme (to generic), but some of the deeper more ambient stuff. Also, the Conan soundtracks have interesting tracks deeper in.

audiolicense.net has a lot of good tracks, including orchestrals and ambients with different regional flavors, that can be ripped easily with RealPlayer.

P.S. EDIT - Nile, a death-metal band with a distinctively Egyptian Mythos angle, always includes some interim tracks with very dark egyptian-style invocation chants (in-between the regular balls-out metal songs). The album "Amongst the Tombs of Nephren-Ka" comes to mind... it also includes their own synthy/mid-eastern remake of "Mars, God Of War" as a song intro...

__________________
"I'm not just going to hell...
I'm helping to build it."
-Self quote to brother-in-law