I don't think I would've thought of setting up a table for homemakers at a career day, but now that you mention it, it's a great idea.

Here are the things I can think of off the top of my head:

Pros:
Taking care of your family and children yourself, the way you'd like it done, and getting to know and enjoy them
(Corollary: No or lower childcare bills)
A person minding the home can keep on top of things so a working spouse doesn't have to worry about them
Errands can be run during off hours
Self-direction and flexibility

Cons:
Self-direction and flexibility! (With few outside deadlines, it can be easy to procrastinate or let tasks take all day.)
Possible social isolation (unless you take steps to get out and be involved)
Possible disdain/disinterest of others (it can be hard to answer the question "so what do you do?" at a party or join in conversations about work)

Have a look around the rest of the site, too, if you haven't already. There are a lot of good articles. Good luck!