Plaxo Pulse

Plaxo Pulse is another networking site but seems to be more of an organization tool to me; I was invited by one of my LinkedIn connections who works in Marketing, so is far more outgoing than I and has a ton of connections.

It's another site to which you can invite your contacts; no, I haven't invited everyone whose e-mail address I have captured! It seems to function as an address book and calendar, in case everyone you know needs to know what's going on. The calendar is prominent and I received an automatic notice of a contact's birthday; she's in the network but we're not connected.

It doesn't seem as useful to me as LinkedIn. Maybe there's something obvious I'm missing.