You can all try again at a later time, the invite is still valid.Note, I've been informed by a Googler+ that invites are rate limited by hour. So if they can't click through that first time, they can try again later with same link. (You don't need to resend it)
Hey guys
I have a few invites. PM me your email address if you want one.
BTW... I think I'm liking this Circles concept. This is something I can actually use for family, friends, customers, business partners, etc. You know, customers don't want to see pictures of my dog, and my family doesn't give a shit I released some software upgrade. I like this!