There's no question Plaxo Pulse has been an interesting development within the service over the last year. But the company's origins, as a business contacts database, similar to LinkedIn, have led to it being seen as a business tool. For me, the contacts I have in Plaxo, thanks to many invites over the years, are largely colleagues, business contacts, or partners - in contrast to more social databases, including Facebook, Twitter or FriendFeed, which are comprised of Web peers, casual a ...Read the full article