Programmable Web: DonorSig

25 of the submissions are being featured in the DonorsChoose.org special showcase, and 8 winners were selected by the contest judges as contest finalists. Out of the 8 finalists, the contest winner was DonorsChoose Signature. Created by Michael Nutt, DonorsChoose Signature creates a dynamic email signature to show classroom projects in need of funding each time your email is viewed.

http://blog.programmableweb.com/2011/08/03/stephen-colbert-awards-trophy-to-email-mashup-developer/