Sounds like a good idea, as for the keyboard a company called Inovations, I
think, has created a little device that allows you to use a standard PS2
(the computer standard NOT playstation 2) keyboard on the dreamcast.

There should be a way to do that, first you will need a device that will
disrupt the dreamcast. like BLEEM, I have seen CDs that allow you to swap
disks and play imports. and then you have to figure out how to program for a
DC. Maby if enoungh people ask SEGA they will give out the program codes for
the DC, it is not like they will be needing them