When I create MIDI files I usually use a notation program (in my case Personal Composer). I tend to put the lyrics under the dots, because it helps me check that it all fits together. I also have many scores which have multiple parts and which therefore couldn't be easily posted using MIDI-TEXT. How about a place on Mudcat where scores could be posted ?

Because we probably all use different notation software, I would suggest that Acrobat PDF file format would be the easiest way to post them. Providing that they are created by printing from the notation program to a PDF file print driver (rather than from a scanned input), they should not need to be very large. A 4-part score of the glee "Hail, Hail Smiling Morn" which is 4 pages long, only takes just over 100K.