what does the DiskOnChip provide to the LinuxBIOs project that the standard flash chip can't?
More than 2 megabits of storage.
My second is that I'm going to be using the VIA EPIA MII motherboard which has a PLCC BIOS, as far as I can tell PLCC DiskOnChips aren't very readily available. Should I use a DIP to PLCC adapter; how did the other people who used this board do it?
The trend seems to be NOT to use DiskOnChip but rather a CF <> IDE adapter. Using FILO you can boot from the CF.
My final question is how do I pick the size of the DiskOnChip.
So if you're going to go for the CF <> IDE, then it just needs to be as big as your root partition (or even just an initrd). There are many other alternatives depending on network, disk, etc.
And if you've been following this list for a bit you'll know that you can't (yet) boot off of the CF adapter on the EPIA MII.
One last word of advice, get a bios savior.
Larry