Comics
The Argyle Sweater by Scott Hilburn (7/29/2009)
Sergio en Internet by David Uriarte Diaz (#69)
T-Shirt
I've seen this before, but I don't know who made it. And I don't get it either. I think it is from Europe...
Cosplay
Alisa Farrington at Dragon*Con 2008
Claire Storm and Alissa Farrington with Misfit Theatre Group (If it is legitimate children's theater, is it still cosplay?)
Mark Tatull at the 2009 Reuben Awards -- yes, that is the cartoonist who does Heart of the City and Lìo!