Microsoft could easily add keyboard and mouse support. The USB ports are already there and adding mouse and keyboard drivers wouldn't be a problem for Microsoft.
It's annoying that they don't offer such support since it would do wonders for FPS and strategy games on the system and could bring point and click adventures to the system.
As for that mod, it looks like they've basically used a few dollars worth of components and modified the controller, it's not worth $180, not even remotely close (in my opinion).







