Generic model Memory Stick Pro Duo on the Deal #2 tab. Can't be a bad deal for PSP users, as it claims a 40MBPS Write Speed. $3.99 flat shipping for basic shipping, or pay more to get it faster!
Also, there is a 4GB model with the same generic name for $6.95! Same specs as the 16GB stick, with what I would assume is the same shipping cost. I'm in for two if the 16GB versions!