Wow! What a neat idea. SLA is now selling 2009 Centennial Stamps through their website.
SLA Centennial Stamps are a great way to show your enthusiasm and support for the association's 100 year anniversary. Stamps are sold per sheet and contain 20 U.S. first class postage stamps with the SLA 2009 conference logo.
Stamps will be shipped via Priority Mail through the United States Postal Service at a flat rate of US$ 4.80 within 3 - 5 business days.
If I actually mailed anything, I would buy some :)