501(c)(3) is a big topic, so you may need to narrow down what information you want (and we may need to move this question back to another area). Also, if this gets more detailed than what's appropriate for the Forum, feel free to email me directly. On the 501, regarding liability, the lawyer at the show was very clear. 501 is great for credibility, allowing deductiblity of contributions for the donor, may be required for seeking grants, might offer other perks like non-profit postage rates, etc. However, it has nothing to do with liability or reducing liability. If you want to know more about the PROCESS of filing for 501(c)(3), I've posted quite a bit of what I learned at different times on the Forum, and I'll be glad to share more if I know what you need.
We completed the process in November, and I really didn't find it that bad. Again - disclaimer - I'm not a lawyer or CPA - just a regular person learning as I go through good faith effort.
(For what's already been posted, you may want to do a key word search, maybe using "501". Also, a "best kept secret" on this Forum is that if you choose the Profile of a participant, there's an option "search all posts by this participant". I tend to post a lot on the management/infrastructure issues so you can see what all I've said before.) But, again I'm no expert - it's the collective knowledge and experience of this group that really helps.
Regarding the incorporation, I called our Secretary of State's Office yesterday. They do rather talk in circles, since they are so concerned that anything they say NOT be taken as legal advice. However, the lady was as helpful as she was able to be. Our state rules will likely be a bit different from yours. It's a two page form with various attachments required. I figure I'll just slog through it and figure it out as I go.
Let me know if I totally missed the answer you were seeking.