"I’m getting off my butt and putting together some web services for 43 Things, and I’ll hopefully have something to show by the [Web Service Mashup at the Emerging Technology Conference]. Thinking about it this week, I think I’m just going to build a REST API, and pass on the SOAP and XML-RPC formats for now… is that selfish of me?"
03/18/05 update: 43 Things Web Service API.