Memory Pit is a new DSi exploit in the DSi camera!
Using it is very simple:
Download the attached file and put it in sd:/private/ds/app/484E494A
Put the hbmenu.nds file on the root named boot.nds (can't be unlaunch, it won't work. Unlaunch can be booted via hbmenu however)
open DSi camera, tap SD card at the top, and tap album
Enjoy modding your DSi!