"So what do I gotta do to sell you a good used coffin today?"
I found this nifty utility called Scumm Revisited, which lets you extract pretty much everything (text, backgrounds, music, voices) from Lucasarts adventures with the infamous Scumm story system. Unfortunately it's not yet capable of extracting character sprites, but after searching some more I found two simple programs to do just that. Rockin'! One word of warning if you're going to try this though, the programs can be just as fickle about which system they'll work on as the original games are.
(for browsing Scumm media and extracting it)
(for ripping sprites from Full Throttle, the Dig and Curse of Monkey Island)
(for ripping sprites from other LucasArts adventures)
-Forum post with the getting-started on the latter two programs.
"So you're, what, a size six, right?"