Carrier Idea
 

Glenn suggested this.

I've also thought about doing this before. I first saw something like this done in 98 or so on an AVR development board.

My plan was to make a 324 FBGA and/or 256 MBGA adaptor for some large xilinx FPGAs. I wanted to use these to improve the ram wall. :)

http://www.a2retrosystems.com/images...p/CIMG4064.JPG