If you're in the US (and I'm not), you apparently now have access via Google Print to C.H. Grandgent's Introduction to Vulgar Latin ... By the way, the Google Print project seems to have revived; William Annis has done some early poking about ... Lifehacker gives a good technique for filtering out the 'out of copyright' stuff that's available, although it is somewhat disturbing that a number of things which one would think would be out of copyright are not available in their entirety.