I asked TF the same question, and he said that the archive function in vB is more of a move-to-a-different-forum function than actually taking the stuff offline and made available in other ways.
You always have the option of d/ling a thread. Click on the Thread Tools dropdown at the top of each page for a thread, and you'll have that option.
You always have the option of d/ling a thread. Click on the Thread Tools dropdown at the top of each page for a thread, and you'll have that option.