Are you getting a rental car? Most of the "cabot tours" and Ben & Jerry's are in Waterbury. You don't want to travel that far, if you don't have to.
The best place to go is Church Street (there are several eateries and shops, including B&J's.) There's a couple of restaurants on the waterfront in Burlington also, and like another poster pointed out, there's a Lake Champlain tour... if you're up for it. It'll be nice out probably in July, so it might be worth it. Do you know which hotel/ conference center you'll be at? There are SEVERAL in the Burlington/So. Burlington area, so as to give you a better idea of where to eat/what to do, it would be a good idea to know where you'll be at!
We live near Middlebury, and go to Burlington often, so if you need any help... just ask! (there are several websites for Burlington events and things to do... just remember to find out what the distances are from your hotel... Waterbury's about 45min.-1hr away.)