I think it’s actually an easy way to reel people into 43T from “the outside”... ;-) People have been so accustomed to finding all their friends on friendster and myspace that 43 People might seem more easily-comprehended on first glance.
The idea of being able to see so many different types of activity with one subscription is really appealing, but of course you’d have to connect with people who are well, active online, to benefit. Through looking around at what some people are tagging on here and other sites, I’ve found some great articles, re-discovered websites I’d forgotten about, checked out some wonderful photos, realized I was connected to people who’d cheered me through people in my own town, etc. etc.
I’ve been off for the past two days so I’ve really been exploring… basically, if you’ve got the time to follow your bliss online, you’ll find plenty of relevant and inspiring content through the 43Peeps portal. Hope this is helpful! =)