Here's a really interesting tool that will show you how influential you are as a Twitter-er....
It's called "Twinfluence" and basically all you do is go to the site, type in your Twitter screen name and password, and then click the "measure this Twitterer's Influence" button.
It then analyses about seven/eight pages of Twitter data and in a short while it present you with the following items of information:-
1) Your rank - mine stands at 90%.
2) Second order followers - these are all the folks you can reach via your own first level contacts....and on and on....I was shocked that my influence can reach as far as....wait for it.....7,854,702 Twitter members (!)
3) Velocity - the speed at which you have attracted second order followers per day.
4) Social "Capital" - mine's "very high" (smug grin here....lol)
5) Centralization - this indicates your dependency for your network on a small number of members. I.E. if you lost certain central members - would your network collapse around you? - My smug grin disappears here as my rating for this was "Average-Fragile" (!)
There are more in-depth explanations of all these term on the site and it's really good fun to have a pop and see how your doing on Twitter...
It's at....
http://twinfluence.com/
Follow me on Twitter at:-
http://twitter.com/kevinfroude