My current plan is to use it to announce photoblog posts, pushed through to Facebook.
If you add me there, and your LJ or DW presence is primarily tweet aggregation, I'll probably remove you here and follow you there.
Pretty soon I'm going to need a flow chart to track all the social media and how information is passed through them.
Don't laugh, I've seen it done. And thought, hmmm, that looks very helpful.