Eh, I don't like it. It has potential, but like nutmac said, Pulse seems only half complete. It doesn't do any one thing really well, and seems to do a lot of things not well enough to make them at all useful. I feel the same way about this as I did with the Pageonce app, which theoretically could have been brilliant, but ended up being just too weak in everything it tried to do.
Also -- three unknown people appeared as "contacts" for me, and I had messages from each one. The contact names and messages were a mix of actual words and gibberish -- it was really weird. I can't seem to delete these people, which is really frustrating -- so instead, I think I'll just delete the app...