What Would You Like to See in a Twitter Analytics Tool?

Great news for social media marketers, as a range of sources reported yesterday that Twitter plans to launch its own analytics tool.

According to Mashable, the product will be free initially, although I'm inclined to agree that there may be a paid version available further down the line which gives users access to more detailed stats, similar to the Flickr professional account.

The tool is being built by the team behind Trendly (a Google Analytics Analyzer apparently), so hopefully it will present meaningful stats (don't talk to me about Facebook fan page insights). Here's a few features I'd like to see in a Twitter analytics tool:

1. Click tracking on the links posted by a particular account would be great - I know this can be done with bit.ly but to have it gathered together and interpreted in a more centralised tool would be much easier.
2. Visitor numbers is a no-brainer - would be interesting to see how many visitors convert into followers.
3. Referring sites would also be useful, providing you with a better idea of how well those 'Follow me on Twitter' buttons actually work'.
4. As well as referring sites, a general traffic sources section too. Are we gaining any followers through organic search/online PR or is it all coming from existing websites/social media accounts?

The majority of the above info is currently available if you know where to look, or if you've invested in a paid social media tracking tool, but to have a central hub for Twitter analytics info will make the whole process of working out just how successful a Twitter campaign has been that little bit easier.

Obviously there are loads more features that would be really useful in a Twitter analytics tool, these are just the first things that sprung tio mind. What would you like to see in a Twitter analytics tool?