I will answer my own question. If anyone is looking for information on the tzero ico, they are filing it under t0 or if you prefer, CIK 0001726726.
So far they only have one filing which details the sales to date of the ICO. There is nothing regarding terms of the deal. Things are actually a bit slow on the ICO with only $8M raised to 46 investors. However, I suspect this may just reflect processing delays in validating investor accreditation.
I did find in the latest conference call some mention to the ICO from Byrne. He said that OSTK will own 60-70% of the tzero, down from 81% currently. Based on those figures, the tzero ico would own 15-25% of tzero, with $250-300M raised. If they are able to pull that off, that would imply a valuation of tzero at $1B-1.5B. OSTK's share would be $600M to $1.1B.