Have you guys checked out Inventory API & Simple Stock levels?:
http://www.ubercart.org/contrib/132

it is really sweet. If you can print out the levels of stock on admin, then yes, you will be able to do it front-end.

U just need to add the "stocklevels" from /admin/content/types/product/fields
to show on your product pages.... (haven't tried, but sure it would be easy)..

Would be a nice addition.. Will post if I have success..