Everyone,
I've spent an extensive amount of time updating my mk2/mk3 user's guide recently (now includes ALL the information I know about the MK3 2006/ NEO-KEY and next version of flashme - subject to change if I get new info) Thanks to cory for verifying the items I wasn't sure about myself
Key Points1) With MK3 2006, you still need a flashcart if you want to play gba games on your ds since NEO-KEY has very limited flash memory (as far as I know, menu is going to eventually support gba games on the SD card, but they still need to be flashed to a cart in order to work).
2) You're going to continue to require a flashcart/NEO-KEY to boot, at least until the next flashme AND menu 0.7 are released.
2) The next flashme AND menu 0.7 will eliminate the flashcart/NEO-KEY requirement. EXCEPTION: If the menu gets corrupted (such as when flashing from the SD card to the magic key itself), you may STILL need that flashcart/NEO-KEY in order to recover a previous/working menu.
See my complete FAQ here:
http://www.neoflash.com/forum/index.php/topic,1529.msg7919.html#msg7919BruceG