John,

I am a Community Manager here at iTaggit, and I would really like to help you find more information about your dinnerware.  A couple of things that may help are identifying how many pieces are in the set or listing the primary colors of the pieces.  Also, uploading an image of the pieces can allow other iTaggit users to compare the items with other pieces they may have found.  

You may want to look at some of our partner sites such as priceminer:

http://www.priceminer.com/affiliate/affiliate.jsp?affiliateId=8749&bannerId=6

or What's It Worth 2 You:

http://www.wiw2u.com/index.cfm?fuseaction=users.Registration&act=form&eval_code=976338

These sites allow you to search for similar items or get an appraisal for your items.  I will continue to search for more info and good luck,

Eric