[X-Newbies] airtunes + speakers

[John Park]

Hi everyone,

two questions:

I've got a G4 about 500mghz.   I don't think it came with airport 
installed, which is what I assume I need to make airtunes work.

When I buy airtunes will it come with airport or do I need to buy 
airport card or something else extra?

Also, I'm curious to know what kind of powered speakers people might be 
using with airtunes?
I won't be hooking it up to my stereo system , just want to get a 
powered speaker or something of the like.

Thanks
John Park