This report on influence on Twitter by Boston research group, Web Ecology Project, is pretty interesting. It’s too early to draw too many conclusions but why you tweet seems to be more important than when in terms of building influence.
Personally, I’m more interested in influence within smaller groups versus a wider community of followers. At ShareOnce.com, we’re working on comparative analysis tools for groups and their members to see how they stack up with their peers (other groups/members in general and within a geo-location or business segment). If you have suggestions of analytical information you would find useful in business networking, please let us know here.