I'd like this for Twitter, which IMO has a much more qualified social graph.

I've been using this for a few weeks now as part of the beta. It is a great extension and give you awesome context about your linkedin 2nd and 3rd degree connections!

LOVE THIS. Conspire is super solid and deeper than checking connections on LinkedIn.

Has anyone created a copy of this since they sold and shut down?

It's pretty cool - in that it started with the oldest social network - email. It's amazing how big your network gets when you factor in your complete connections. Linkedin showed how, over time, thats a big selling point.

Using it for a while now.

Do not get why it is advertised as "See your best connections to anyone on LinkedIn", but instead of LinkedIn it requires access to another service — gmail/contacts. If you say LinkedIn, use LinkedIn. Otherwise no can do.

This is interesting....kind of a creepy name though...