American Loopers has a few programmable ones out now (different amount of loop options). They're small, built like a tank, and have soft touch relay bypass switches that are rated for over one million cycles.
I have a custom bypass strip, but wondered about adding a relay system like that to avoid clicking and popping. Even talked to Spencer over at 3Leaf about him loading his relay switches into my enclosure, but he said they aren't for sale at the moment.
American Loopers hit the nail on the head. The things rule (I have no hands on experience). http://www.youtube.com/watch?v=04qL5_JypnI