The donate links are leading to AE911truth for which they're claiming "AE911Truth is an IRS approved 501(c)3 tax exempt non–profit corporation."
http://www2.ae911truth.org/b7advert/taxdeductible.php
Yep.
World 9/11 Truth have a donation page on their site:
http://world911truth.org/most-important-911-truth-campaign-ever/
This seems odd because it looks like they're the only fundraisers, omitting A&E's page.
I contacted World 9/11 Truth and asked them if donations to their site were tax deductible, and they said no, they're not. I don't see them advertising as such either, but anyone who heard about the fundraising drive being tax deductible and then donated at their site would be duped, or might lodge an illegal tax deduction claim. Although, caveat emptor.

Update on the campaign coming up in a minute...

Thanks!