Question about AirPort Express

is it possible to ave any programs other than iTunes play through speakers attached to the AirPort? and how do I get video sound from iTunes to play through the speakers?

http://www.rogueamoeba.com/airfoil/ This app should solve all your problems.

anything free?

ok, that Airfoil app sucks. Horrible sync when playing videos (few second lag).

also, is there anyway to make the airport express extend the range of the network from a router other than the airport base station thingy? I have a linksys router but the signal drops out on the other side of my room so if I am on my bed with the computer, the sound stops sometimes (like it has to re-buffer) because the signal is weak.

MBasile:
How big a room are you crossing to lose wireless signal on the other side? Line-of-sight you should get at least 50 ft before losing signal strength from the Linksys. If there are large, metal barriers in the middle of the room, I could see that blocking signal, but in any typical room, signal strength should be the same, whether you are standing next to the wireless router/AP, or across the room from it.