Read more here.
There are links to information on what the litigation is about - stifling free speech and questioning AGW.
It appears that Michael Mann has decided to take action against people who have criticised his AGW theory and derailed the tax juggernaut.
This should be interesting, unfortunately Dr Tim Ball will have to pay. Please see the site for donation information.
Links to explanations of the litigation are here and here.
Thanks to Minicapt!