They seem to be branching out quickly to new IM clients (facebook and gChat recently, I've noticed) and expanding their staff (current intro box says they're up

They seem to be branching out quickly to new IM clients (facebook and gChat recently, I've noticed) and expanding their staff (current intro box says they're up to 90). Has anyone worked with their API/do they have one? It'd be a useful thing to develop with a single source's API and be able to utilize all these different communications options in a single system.