Well I have a N-Card, and it has a USB Linker that works great with the computer. I have two homebrew apps that use this. DSpad (NOT related to the DSpad plugin for iDeas or the wifi version!) and DSMouse (once again NOT the WIFI homebrew app that everyone else uses!). They use the USB cart and makes the DS appear as a gamepad when using the DSpad app, and a trackpad style mouse when using the DSmouse. However I would like to know if there is any thing else out there that uses this device other then the two aforementioned apps. Like a app that can turn the DS into into a USB wifi stick. (lol why not? Slow as hell, but it can be usefull if you have a old laptop or at computer without a wifi card!) Other things like using the USB thing to turn the DS into a MIC or to dump roms direct to the computer (instead of messing around with that Wifi dumper or using that slot2 app when you could just dump direct to computer via the USB. I'm not sure how often the USB GBA device is mentioned around here, but there's quite a few usefull things you can do with it, and I have yet to see anything other then those 2 apps that use it. If there is anything else out there that uses the USB device, then please point me to them or simply post a list of apps that use it so that I can google them. Heck it would be interesting to see if any of the DSLinux devolpers can do with this device, like making it so DSLinux can communicate via USB to the computer as a file drive and such. Sure the N-card has builtin USB linkage software so you can transfer files to and from the N-Card, but something homebrew that supports the sleep function and other more advanced features (like being able to unplug from USB and plug it back in at a different/same computer wihtout restarted the DS) would be sooo much better!