I joined the Zibbet community recently. If you are an artist of hand made items then you need to know about Zibbet. It is very similiar to Etsy.
I opened a shop there (Fabricmom) to advertise the quilts I make. Right now I have up a listing for a crib sized memory quilt.
The community is for the people who have shops to communicate and share information. I came across these two articles about tagging. They are both full of very good information.
Now of course it will probably be my luck that you have to be a member to read the articles.