They also have a calendar view of database data, where they parse out date-like values and plot them on a calendar - and you can apply the same searches against the calendar view, too. It's a really fast, compelling interface - better than some of the When calendaring apps we saw in the last session.
The audience was very complementary, and both Michael and Rael on the panel seemed impressed. A great product.
Dabble DB is written in Smalltalk using Seaside, a continuation based web framework.