Jason of eGullet sent me a note, and I thought I’d pass it along (considering I am an active member there and all). If you want to read the whole bit, you can find it here.
The eGullet Society is pleased and proud to announce that our petition for 501c3 tax exempt status has been granted by the US Internal Revenue Service. This means that donations to the eGullet Society are tax deductible in the United States. In addition, under Article XXI of the United States-Canada Income Tax Convention, US 501c3 exemptions are recognized in Canada. Our tax exemption, as approved by the IRS, is retroactive to October 4, 2004, so even if you made a donation several months ago you can still claim a deduction for it.