For albumart you need to first extract the iDtags/Meta from the stream
look it up in some database...then present the correct album-art pic.
Problem will be that you probably dont have the album art yourself.
Existing solutions are to signup as affiliate with:
Amazon
iTunes
they provide scripts that will allow you to show
album-art (from their own huge database)
it will also include "buy this " buttons.
which can get you some small revenue.
I recently found a 3rd party (paid) service that will do this for you
so no need to sign up with Amazon or iTunes yourself
I have no experience with them..their page is UGLY but the info looks fine:
http://getmarci.com/
Since its not that expensive...you could do a 1 month tryout.
(i wouldn´t mind hearing from you how it went)