[leoedin]

What proportion of web applications are funded by large companies? Obviously in terms of actual users, there's always going to be far more consumers than corporate users, but in terms of dollars-per-user? Any large company will have a large number of internal, normally web based, tools for all sorts of things - training, asset management, expenses, travel booking - and the amount of money that the company will pay for these tools will always be higher on a per-user basis than either adverts or consumer payments would bring in. Certainly sites with almost no broad corporate use - social networks and the like - will have fairly insignificant IE use, but corporate facing web applications will see broad IE use.

ChromeFrame is great, but it is probably against the usage policies of a lot of companies. Even if it isn't, most people are fairly wary of installing something on their company machine. You'd need the IT department on side to get broad deployment.