gtsjames,
I haven't tried this yet, but I plan to soon...
And so, there are tons of trialware applications, downloadable on the internet, that boast converting mp3's to midi... how well they work, I don't know, but they are probably worth a try. I would think that some of the up to date versions of the more advanced studio tools would have this capability also, if your'e blessed to have one of them.
HTH,
God bless,
Eggs