AGB is your new god. Bow.
Nintendo recently posted a new Q&A on the Game Boy Advance. Go check it out! Most of it is the same old, same old .. but a couple of items of interesting note are the fact that over 70 developers attended Nintendo's recent Game Boy Advance Developers Conference, and that Nintendo expects more than 130 companies support the GBA.
I'd like someone to explain to me once and for all why this cartridge based system gets all the developer support, but the other one didn't. I just don't get it sometimes.
