1. Yes. We're equal opportunity for all.
2. Rarely are GB's graded or judged. In fact, it's usually discouraged. The badge is nothing more than a visual, uh, badge that you've participated in the GB. The rules of when you can claim the badge vary from GB to GB. Frankly, if I could give a word of advice...forget the badge. I see far too many newcomers to the forums get OBSESSED with badges. The point of the GB is to build to a common theme, learn something, have some good comraderie and HAVE FUN! Badges should be a low priority.
3. See the rules of the particular GB to determine when. As far as how, there are sticky's on the forums already on how to display pictures. If they've disappeared do a quick search and you'll find a ton of good info.
4. Sorry, but the GB police won't allow that. Just kidding. No one is going to disallow you from participating in another GB just because you don't finish one. Life happens sometimes.
5. Yes, but I'd definitely wait till later on, much later on, when you've have some experience on the whole GB process. It takes more work than you'd think to run one and frankly there are too many ill-thought GB's which slowly die out due to an inexperienced GB mod.
6. HECK YES!!!! One of the main points to a GB is the opportunity to share research, techniques, etc. Participation is strongly encouraged.
If you have any other questions, don't hesitate to ask us.
Again,
Edit: I see we were all typing at roughly the same time and have managed to throughly and completely answer this to death. Doh!