The discussion made me curious about the confirmation messages you get, so I checked four cases, based on the account status and whether you are buying a song or an album:
1. Empty account, song download:
Are you sure you want to buy and download the Song "MacRumors Melody"?
Your credit card will be charged for this purchase and your music will begin to download immediately.
Cancel/Get
2. Empty account, album download:
Are you sure you want to buy and download the Album "MacRumors Greatest Hits"?
Your credit card will be charged for this purchase and your music will begin to download immediately.
Cancel/Buy
3. Free tunes + cash, song download:
Are you sure you want to buy and download the Song "MacRumors Melody"?
Your song balance will be debited for this purchase and your music will begin to download immediately.
Cancel/Buy
4. Free tunes + cash, album download:
Are you sure you want to buy and download the Album "MacRumors Greatest Hits"?
Your account balance will be debited for this purchase and your music will begin to download immediately.
Cancel/Buy
I have yet to test these cases:
5. Free tunes only, song download
6. Free tunes only, album download
7. Cash only, song download
8. Cash only, album download
Would somebody with free tunes only or cash only in their account like to post the messages for those cases? You can always click Cancel and not purchase anything.