Apple is really trying to push iTunes music purchases on its customers; evident by the "Store" button located in the upper left-hand corner of the Music app.
I've used iTunes before, but the times I do use it are generally few and far between. This means that the Store button located in the Music app is more of a nuisance than a help.
If you're like me and would like to get rid of it, you should try NoStoreButton, a nifty jailbreak tweak for jailbroken iDevices...