I've added a mix bag of roms to the new tispeak.c driver in MESS:
For snmath: the mcu rom from the patent i typed in recently, the 2708 PLAs from the recent die pic, and the vsm dumps we had. snspell: the mcu rom typed in by Lord_Nigh, the 2708 PLAs, and the vsm dumps of the 1st US snspell release.
After improvements to the CPU core emulation, the roms boot up and look like they're trying to communicate with the 5100 speech chip. I believe the next step is to improve our 5100 emulation: it currently lacks ctl-read support. The speak & spell hardware relies on it not only for speech, but it also reads text from it.