I know I posted about this ages ago and it had quite a response of people wishing they had the tee or was wondering where to get it from - but i'm putting the tshirt Brian wore at Bonnaroo festival some time ago (obviously not the actually one!) up on ebay.
If anyones into that kinda thing then it can be found here - http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=150893759682
It is quite a cool tee and unfortunately I got quite a bit too fat for it now haha!