Bio-molecularTony's thread "(ID) Grading the Intellect from the (non-natural) Design" has also disappeared. It's in Google's cache up through about Message 202.
I don't know what caused this. Earlier this month we ran out of disk space, but that problem has been fixed.
People wishing to resume discussions should submit thread proposals and I'll promote them as soon as I can. It is often possible to retrieve older portions of threads from Google's cache.