I might be overstating it, but Identity Management is the next big thing for the open source community to tackle. That’s why I like Sxip, even though I know so little about it.
There are a number of other solutions stewing, but most of those that I’m aware of are targeted at academic and enterprise users. Wouldn’t it be nice to have some federated system of identity management among blogs?
Yes, IdM is the next big thing, but as an infrastructural technology, it will be invisible when it works.
Here’s another link: The Identity Initiative : iname, FreeID, LID, SXIP, What’s Your Favorite Emerging Digital Identity?