I blogged a while back about the trend of authors previously published in New York writing for e-publishers as well. At least it looks like a trend to me. Dorchester author Bonnie Vanak says on her site that she's sold a manuscript to Ellora's Cave (under the name Blair Valentine, but since it's on the front page of her site I hardly think I'm outing her:-).
Fascinating, as Spock would say. This seems to happen more and more often lately, which suggests either there's significant money to be made in e-pubbing, or that authors THINK there's significant money to be made in e-pubbing!