Froogle:
Developed by Google, Inc. One of the most promising price comparison sites to date.
BizRate:
One of the largest price search sites. Over 30 million products listed.
Shopping.com:
Child of Dealtime and Epinions, now merged to provide you with three shopping search engines that feature your products separately, yet the same.
Yahoo Shopping:
Complete Yahoo Shopping data feed creation and maintenance solutions.
MSN Shopping:
Complete MSN Shopping data feed creation and maintenance solutions.
NexTag Shopping:
Complete NexTag data feed creation and maintenance solutions.
PriceGrabber Shopping:
Complete PriceGrabber data feed creation and maintenance solutions.
WhiskyAuction.Com
Bid online for single malt and other whiskies. Also online shopping.
The Wine Commune
Free person to person wine auctions. Also has a discussion forum.
Brentwood Wine Company
Auction section of site features themed offerings, with various bidding options. Also wine shop with accessories, stemware and wine storage.