It was built by a small, low cost team. At the middle of last year it was run by four people, but then the company got bought by Twitter: http://blog.dabbledb.com/2010/06/140character-dabbling.html

Pretty sure DabbleBD shut down because the company got acquired mainly to get the talent and not for the service. Cannot recall who acquired them.

I only ever played with it, but it seemed like a great piece of work, and was all coded in Smalltalk (Seaside).