I was just thinking about the issues people have with music and large bitmaps in a game at once. (Like the Jagged Dudes project) Then I saw, randomly, this on Ebay:
http://www.ebay.com/itm/VS1053B-MP3-shield-board-with-TF-card-SPI-interface-for-Arduino-MP3-AAC-WMA-MIDI-/231810118447?hash=item35f8f5b32f:g:wE4AAOxyaURThY8TWell I thought about it, and realized it wouldn't be too hard for you to put the music/sound effects you wanted on an sd card on such a device as this. Then, using the SPI interface, you could have GB tell the board what to play at what time. All your conflicts with streaming big bitmaps and music would be resolved. Plus, you would have a headphone jack! I think it's a good, plausible idea. What are your thoughts?