Unfortunately, there are a huge number of corporate environments that have virtually no reason to upgrade their browsing platforms. Many of these environments don't even really have a technical reason to not do the upgrade, they are just administered by overworked staff and upgrading IE6 to something newer and safer is just at the bottom of the list.

The bottom line is that until the end users who have to use IE6 every day become inconvenienced enough (in the form of sites blocking them out, not warning them) or the people who pay these IT admins actually think it's a priority, we're not going to make much headway on this issue.

With that said, I think that initiatives like this are a great start. What I would like to see is a distributed technical effort to encourage upgrades, which is what they are doing, followed up a technical effort to block access to IE6 starting on a specific date. Let the note of encouragement that participants place on their sites let users know that unless their browser is upgraded, they will be unable to access the site as of June 1, 2010.

Eventually these IT admins will be placed in the position of having to choose between keeping IE6 to support their legacy intranet applications and upgrading IE6 because third party sites have started to implement functionality that IE6 doesn't support.