Hi AJSchumacher,
I went to the New York Comic-Con last month (my first time at that convention and I was a panel speaker, too - whee!) and picked up some useful information about the graphic novel submission process, which I'll be happy to share. Some of the info, of course, was more targeted for my own GN query, but I'll post what I think others may also find useful. In any case, if you have a GN project I'd certainly recommend attending NYCC or SDCC to get some valuable in-person information directly from publishers and editors, and other writers/artists speaking in the panels offered at the Con.
- Tanja