I just sampled the PCM1748 from TI.com as well as the TUSB3210PM, a USB controller. This means that I have now sampled all of the big pieces of the project, yeah! So now I need to go to Fry's to get the smt converters so I can test on bread boards and get this minty show on the road.
Just for fun, I was looking for a general purpose RISC machine with full os (not ce or Linux with no x-windows) and stumbled upon Littlechips.com's reduced instruction set mainboard with full peripherals. The linked product even comes with an LCD and can be booted from flash, Compact flash, or SD. All in all a sweet product, that comes with ce .net binary and Linux Kernel for development. The 6.4 inch screen appears to completely cover the mainboard and all it needs is a case and some form of a power supply and this could be a very mobile or compact computing platform with the 2.4 kernel.
I am looking for other small platforms like the PC104 and other low power consumption fully functional platforms so if you see any please post some links in the comments.