Apparently it was announced on a Montreal radio station, according to this webpage from PEI: Island Peace.

The only other thing I could find were references to Mrs. Bush cancelling the poetry reading earlier this year because she didn't approve of the fact that many poets were going to voice or show their opposition to war. In those stories I found the poet lauriet of CT was going to wear a silk scarf imprinted with peace symbols which she commissioned just for the ocassion.

I'll keep looking.