Here's a site I built using the Ubercart and the Acquia Slate theme from Top Notch Themes: www.caldwellpics.com
I'm not using the Ubercart Catalog but rather a custom Catalog built with Views and Taxonomy. Seems to work a bit better and I have much more control over it. I modified the Acquia Slate theme with UberCart specific CSS so it works together nicely (since Acquia Slate isn't a UberCart theme by default).
i was actually looking at Acquia Slate just yesterday and playing around with the theme. i swear, if you see my site change to your theme i'm not just copying you 
lol
such a simple site but looks and works really nicely. i don't see any various sizes, do you just sell one size for the $75?
did you put it into the live site area? i don't think i saw it there.
Very nice use of Acquia Slate! Haven't seen many live implementations of Slate, much less for Ubercart. Also, I've been here and I got engaged here. Nice shots! I love Oregon. 
one forum i'm on, people are whining about oregon being really gloomy and grey haha you musta been the one day the sun was out 
hehe, spam filter thought this post was spam ... yay spam!!!