It would be a really great gesture, when it is finally admitted officially that the cart is abandoned (I'm assuming that they are waiting for all stocks to run out first before making the announcement so they don't have to be offloaded at a knockdown price) that the DSX team hand over their work to jolly clever people like yourselves.
Without having to waste time reverse engineering what's there already you can begin playing with that superb hardware.
Here's an ironic twist - with further development as an open source project, over the years the DSX could even become a highly prized rarity, capable of so much more than any other cart!
Whaaa....just five more minutes mummy. Oh, I was dreaming
No, but seriously, it is an exciting thought. As has been pointed out, just the things that could be done with the USB port could make it a homebrew developers dream.
Or an entry level ($100) fpga kit?
At the end of the day, it's an fpga in a slot 1 nds cart, so it would be more of a "entry level fpga to do stuff with an nds" - unless you think there's potential to configure the fpga to do stuff via the usb and be useful outside a ds? (Although that would seem a bit of a waste to me?)
Would you be able to answer a question - let's say you configure the fpga as an extra cpu (the favourite example of the long lost DSX team). Would this be accessable to .nds code? Or only at the firmware level? If nds roms could use the extra "3rd processor" functionality you could have full speed emulators for systems like neo geo, n64, more recent coin ops - SOMETHING OWNERS OF OTHER FLASHCARTS WILL NEVER HAVE!
If it's only available at the firmware level, what about a hardware coded GBA emulator? I know it seems silly when the nds already has one, but of course it can't be used directly from slot 1 - again the DSX would demonstrate itself as achieving something that is impossible for all other slot 1 carts....