Remote Control Your iTunes
Found this interesting article over at MacDevCenter on tricking out your cellphone as a remote control for iTunes:
"Build an iTunes Remote Control by Matthew Russell — AirPort Express is great for streaming music from your Mac, except when you have to change tracks from another room. There are commercial solutions available, but here's a great evening project using your web-enabled cell phone and the power of Mac OS X."
Check it out. It's a nice intro to the Apache web server included in OS X, so it isn't exactly for the faint of heart.