Ok Guys
Just got a response from Steve Gibson:
Hi ******,
You are welcome to use the image at the TWiT page, and, yes, any anti-Phorm campaigns are also welcome to use the pic and links, etc. We're all on the same side in this issue. 
Thanks for your note, for your interest ... and all the best,
The image to link is at the URL below:
<<http://twit.tv/sites/all/themes/twit/img/podcasts/podcast_2.jpg>>
[img]Download Failed (1)[/img]
and create the link back to:
http://twit.tv/sn151
This will be more professional looking. And as Steve Gibson says above, all Anti Phorm Campaigns are welcome to use