A Twitter analysis service that:
Maps your followers by geographic location Measures growth (or decline) of followers over time Listen to what your followers are talking about Action reports, how well you did yesterday Analyze anyone (competitors for example) Assess followers/following Hashtag/Keyword tracking (down to city level)
You could do all of this for yourself but TweepsMap has the convenience of simply working. Thus, suitable for passing on to less CS literate co-workers.
Free account requires you to login with your Twitter account (of course) but the resulting mapping may surprise you.
I didn’t see it offered but being able to analyze the people you follow would be a real plus. Not just geographically (to make sure you are getting a diverse world view) but by groupings of hashtags. Taking groups of hashtags forming identifiable groups of users who use them. To allow you to judge the groups that you are following.
I first saw this in a tweet from Alyona Medelyan.