Dave-
If you haven't already done so, check out www.rtpress.com, although
not really a large scale publishing company by any sense of the word.
The publisher, Sue Keller, on her site says that she uses Finale, and
honestly, if you have the patience to learn Finale, it makes great
scores, and once learned, is actually quite easy to use.
Although I only have one piece composed, arranged and "published,"
(numerous others in the works) I intend on doing what the other reply
to this topic said, that being doing it myself. Once finished on
Finale, I am going to go to a local print shop (Kinkos or QuikPrint or
something) and have them do up a fancy cover for me, and have it
looking all nice.
I hope to have a small "songbook" to my own credit this year...
Dan