Poll results are in...
Of the 175 respondants at the time of this writing:
31% - Want tunnelling DS games for online multiplay
19% - A DS browser.
12% - Linux on the DS
9% - Expand Pictochat for regular IM'ing
9% - A wi-fi media player
7% - Wi-Fi "direct link" support for GBA games?
1) The project we should all be rooting for is DS Linux - a hefty 50% + of respondants DS wishes could be fulfilled if a workable (simple) Linux port comes to the DS - opening the door for browing, IM, RSS, and everything else.
2) If you're working on a tunneling software for the DS, don't forget to include support for GBA direct link games. You'll bag a hefty 40% of the respondants for sure and the rest of quite likely.