One of the biggest issues IMO with Ubercart 2.x is that it is not based on Views. Unfortunately, this leads to not having the ability to filter based on taxonomy, price, or any other feature of the product content type.
I am looking for a way to filter a list of products by these attributes (taxonomy, price, etc...) An example would be similar to this page:
http://www.modelplanes.com/military-airplanes/airplane-kits/1938+1940+42...
where there are multiple attributes that can be checked to filter the list simultaneously. I have not found a module yet that can accomplish this. If there is anyone in the Indiana or nearby user groups that can offer insight, that would be great! If you have done something similar to this in the past and can recreate it quickly, this could end up being a paid opportunity.
Thanks!

Comments
UC_views?
Was UC_Views not enough for you? It will help you to find the fields like price and so on. I know you can filter by a lot of that stuff, although you may need some help with increasing the filter functionality like with better_exposed_filters or sexy_exposed
I've also come across this http://drupal.org/project/aef but I haven't tried it yet, so I can't say for sure if it would help you, but it sounds like it might :)