Hi Homeless - I am a committed fan of NoteWorthy Composer (at $40 odd it's hard to beat) but I just written a review of NUSE in the Mudcat FAQ Thread.

If you want to trade vocal harmonies (including lyrics) I personally wouldn't touch the ABC suite of programs. Great though they are, the current ABC standard which they rely upon fails abysmally when it comes to lyrics. While the MIDI standard isn't much better, the proprietary file types used by NoteWorthy and Muse do a fairly good job of associating notes and lyrics. For that reason each member of the group would need to have the same type of software.

If matching the tune and lyrics is no big deal then the choices are much wider. F'rinstance if all of the notation is being done by a couple of people they could use a prog like NoteWorthy and the rest of the group could just use a freebie like Midi Notate - just bear in mind that you can't modify or create new Midi files with this prog.

There's a number of experienced people here if you can't follow my ramblings. Regards, John