'm thinking on building a pc integrated into a keyboard, cheap yet strong enough to go online and run some kind of linux. it would preferably have a wireless internet port, a small hard drive (flash or cheaper) for the applications and OS, and the possibility to be plugged to a t.v. set or monitor lying around the house. i made this little schematic that can help you get an idea of what i'm hoping to achieve http://img17.imageshack.us/img17/4897/picture4ouu.png (a drawing really).
any feedback at all is welcome