I have been working a lot on the FPGA design.  I now have a more accurate idea of specifications.

short list of new specs:

• 100 Mhz Plasma Cortex CPU
• Spartan 6 LX9 FPGA
• 2 MiB of SRAM
• SD card for storage
• ESP8266 for WiFi and Bluetooth
• 30+ GPIO
• Audio and video - no specifics quite yet.

Detailed explenation:

First off, we are now going to use a Spartan 6 LX9 FPGA.  They are much faster, and allow the system to run at 100Mhz (YAY!) - but just barely.  about .5 ns slack.  But doing pretty well!!

I don't have any experience with SDRAM controllers, so we are going for the more expensive, lower density, yet much faster option: SRAM.  I don't want to play with any technology I am not used to for this project, maybe another project I will use SDRAM.

Not entirely sure about graphics or audio yet,  ESP8266 for WiFi and bluetooth, and an SD card controller somewhere in there.

I will either build the graphics into the FPGA, or I will use the VLSI chip VS23S0100.