Google+, the presumptive Facebook killer, shows tremendous potential. As someone who warms up to any social network with the alacrity of a Galápagos tortoise, this, for me, is saying something.
Yes, I'm one of the lucky ones who got a pre-over-capacity invite. I've tried to share a couple, but new Google+ users are only gaining entrance at a halting pace.
The service, which initially stuck me as a blatant Facebook rip-off, actually has many of its own charms, not the least of which is the useful, somewhat addictive Circles. I know this topic divides Google+ users. Some people do not like to spend time organizing their social contacts. I'm not sure I do either, but the method that Circles employs for discovery and organization (dragging and dropping people into actual circle graphics, for instance) is addictive and easily blows away anything Facebook ever developed.