Playing with a couple email tools today.  Etacts and its gmail plugin is a VERY nice enhancement, essentially putting all the functionality of xobni into web-based email.  You see contact info, linkedin profile and social activities of the sender in an expandable sidebar.  It also allows group activities and minimal boilerplate email blasting (first name, last name substitution).

Gist is more of cross-network aggregator that creates a profile page of all your web activities, but more useful, attempts to do the same for all of your email, linkedin, facebook, twitter contacts – so you can watch their activities in a single place.

Both include light CRM features – contact reminders and history and importance weighting for emails/activities