LED Moving Sign Circuit

Hello, I need a circuit that will drive two hundred 8x8 led matrices (10 rows by 20 columns). It is for a graphical message board (like you see at airports and things). I can write the control software as long as there is a serial programming method. The system would need some memory so that it can loop an animation of relatively large size, and also would need to be able to be driven direct from a PCs serial port (for things like stock quotes). The key concern would be low cost of components. I am not sure what is the right sort of price for these designs so if you think I am asking too much/too little then just say and we can negotiate! Many thanks, Matt ## Deliverables Full circuit diagrams with PCB layout Microprocessor source code Payment will be made on confirmation of building a working prototype ## Platform PIC??? Who knows - but the sign would need realtime control from a PC's serial port