I've long got a kick out of sites like Web Pages that Suck which show all the kinds of horrible sites that people come up with, whether due to poor design, usability issues, typos, etc. In addition to all the information on what NOT to do when creating a website, it has the ongoing Daily Sucker which lists the latest and greatest sucky pages that readers have run across and submitted. Yearly winners for Worst Site of the Year are always fun to look at.
In addition to sharing a favorite site with you, I wanted to also point out that you might want to consider if your own site needs an overhaul. CFWebstore is really meant to just be the skeleton of a site, it doesn't come with much design to speak of, it's intended to be used with an existing or custom-made site design. Yet I often see people that are using it without any kind of design other than the bare bones one it comes with. A site design is truly an investment in your site. You are asking customers to trust you as a legitimate business, probably even giving you their credit card information. A professional-looking design is far more likely to convert sales than a site that looks thrown together and amateurish. So it's often well worth the time and money to have a designer come up with something for your store, with custom graphics that will relate to your store. Just something to think about as we get deep into the Holiday buying season!
Having said that, one of the things I'm working on is a new, fancier sample store design for CFWebstore. This design is intended to work for most stores and should be fairly easy to modify for your color palette should you wish to use it. So keep an eye out for that in 2008!