I've been working on hacking the IA-2. So far, here's what I got:
1) Other Disk-on-chips don't seem to work in the socket - I assume that the 16 meg disk-on-chip has some bios extensions needed by the IA-2. Haven't fooled around with the m-systems DoC SDK, so maybe there's a way to slap in a 128 megger with a copy of the extensions on the 16 meg chip, but I don't want to spend any more money on this - it's just a fer a lark. (All I want are: Web access, terminal services, and MP3 streaming over HTTP)
2) By plugging the IA-2 Disk-on-chip into a spare development motherboard we had at work, I was able to fdisk and format it from a floppy with Windows 98 (after ghosting it) - and it boots to the dos prompt fine when placed back in the IA-2 (though the Windows98 splash screen looks kinda funky). I assume this means that it'll work with Jailbait, but I'll have to see. =)
3) It would not boot with a HD attached to the internal IDE header, even though the HD was jumpered as a slave... =( (Perhaps if I could get into the bios, I could fix this). Any suggestions?
That's all I have so far... Nothing definite, but very promising.