Man runs MSN app on his DS
Here we see a fine young gentleman running Beup, an MSN Messenger program, on his DS. According to Rob, the keyboard works about 99% of the time and the program has tabs at the bottom for chatting with multiple users and managing your buddy list. The program sometimes crashes at random, but it's clearly a small price to pay for such a nifty program.
A direct link to the zip file containing the program may be found here.
[Thanks Rob!]