A few years ago I did what you're doing George, I organized an anthology through the forum. We didn't have Kickstarter then so we did it simply to create something together. About 30 participants took part, from single page strips to multiple pages. Here's my recommendations:
1) You need a strong central leader. If you want to be the leader that's great, but it will be a huge amount of time. So you need to be prepared for that.
2) You need to organize a list of prospective writers, and a list of prospective artists. You should receive and review pitches. You should pair up collaborators. And you should act as an editor at the script page and the drawing pages.
3) You'll need to find a letterer too. someone prepared to put in lots of hours. So artists are happy to do this themselves - software makes it easier these days.
4) You don't need a Kickstarter to do this. In fact you should put together the book and then solicit on Kickstarter if you want to run a print run and allow others to sell it. There are lots of comic kickstarters so you should look at the ones that do well and study why they were successful.
5) It's perfectly fine to use this forum to organize everything, just be aware that you're asking others to trust in you and you're signing up to do alot of work, so be ready for that.
6) A printed comic highlighting your work is a good idea. Around 5-6 of the people who took part in my anthology ended up getting various jobs in comics. Having something in print helps with pitches and there's nothing like working and seeing something come off it. That's why I don't think you should rely on the Kickstarter. Leave money out of it and have everyone work for the goal of having something in print.
7) I'd recommend just digital printing through Ka-Blam. You won't be selling many copies (we sold round 700 copies I think). Selling the finished product on Kickstarter is a better way to get people pledging (rather than the promise of something that might be made in the future).
8) This won't make you ineligible for the Millarworld annual.
9) You will most likely have more writers than artists. Some folks will not do the work they say they're going to do. So plan ahead and give strong deadlines and be aware some people will flake out. It's nothing to get annoyed with - life can simply get in the way.
10) I'll reiterate my first point. If you want this to work you need a strong central leader and it'll take a large amount of your time. So be prepared for what you're getting into.
Best of luck!