Some ideas:
Publishing house, try
http://www.publishamerica.com first.
Covers:
Can we get multiple cover submissions by members and vote on the one we use ?
Color is expensive so you might want to think about limiting that.
Could we submit TITLE's to you also, and then you can choose the one you like best.
Who will be putting the actual work together ? In DOC format ? PDF format ? PDF's are great, btw. Maybe Aeternus or other could assist with this.
Do we have any existing zine publishers that could provide some helpful input ? LazarusCorp ?
Maybe avatars would be great too, and serve another purpose. It would allow a lot of people to be recognized that might otherwise not be.
Keep it rolling, don't let the ball drop on this idea. Its a great one.