Nicole,
Yes Craigslist is a good idea too. But I was thinking a local Yahoo group or any local group of any kind.
Something a bit more personal and close to home.
A Mailing list of a club: 4-H, Scouts, Dog fanciers, any groups.
a physical flyer at someone's church
Flyer at the VFW
American Legion
Elks Club
Lions Club
(you get the idea)
Most of those places also have email lists now, sometimes just done with a regular email Ask the creator of the email if they could put a small note about Zibbet.
Here's an example:
Say you belong to a email list about dogs.
And say you do not sell anything with dogs on it.
Search dogs on Zibbet and run a free promo featuring a few dog items from Zibbet.
Do you belong to a yacht club? Do the same thing: feature some natical products.