Hrm... I've been interested in a console based project once my arcade queue clears.  Something about building a console directly into a small TV intrigues me.
I am thinking something along the lines of taking a small TV/VCR combo, ripping out the VCR, and putting an N64 and maybe NES in there... if I could find a way to make the NES reliable.  If not, maybe an N64 and TG16.  
Yes, the TG16 > NES.  A region modded TG16 and N64.  Mmm.