The E-Sylum weekly email carried a report about the Online Database of Coinage of the Roman Empire: OCRE, which apparently does not turn stringy and runny when you boil it but does include 50,000 Roman coin types.
I randomly typed in Trajan with salus reverse and it took me to a listing of all Trajan coins with this reverse. I like this database and have it bookmarked.
Are there any such online catalog projects for Roman Provincials, existing or planned? I've seen one but it appears to be limited to A. Pius through Commodus.