Who are you?

How do you stay plugged into all that is going on out here? I found out about OpenID from the ClaimID wrapper site. What is this? Better web identity management? Should I get one? Am I opening up too much with something like that? I'll need to do some research to see what this is all about. One of the guys who wrote ClaimID seems to have some detail on his blog Unit Structures that I'll check out. Found a few reviews, I'll see where this takes me.