Looks like Prophecy GBA may be released very soon. Hopefully we can get confirmation of this, because it seems awfully soon. We do know they are planning to show the game at ECTS this weekend, so it's possible that there is some confusion.
DVDBoxOffice has a pre-order page up:
Arrival Date: Friday, August 30, 2002
Studio: Bam Entertainment
That's interesting how it says the studio is BAM Entertainment. Maybe the game will be published by them instead of Destination Soft Inc. The latter's website has been "under construction" since forever.
And LeHah found that KB Toys is also taking pre-orders. Their page lists a 09/05 release date instead. They also has a box shot up:
Pre-order: Available 09/05/02
Wing Commander Prophecy, one of the defining sagas of the last decade, is landing on the Nintendo Game Boy Advance. It already won a runner-up award in Pocket IGN's Best of E3 2002 Awards. Just wait until you see this game in action. The 3D engine does the game extreme justice on the small screen. And it features all the missions of the PC game with a four-player link.