Yeah. I turned my fan over the other way a while back. Quite happy with it.
Based on various posts from others, I built my primary bean cooler back in December 2011.
Plastic tub and fan from hardware store (less than $30 for the 2), cut an exact hole in the lid and mount the fan in place and you have a very effective cooler.
I am using an older jerry built cooler for my 2nd cooler at present, but I am about to source a 2nd sieve to complete my 2nd cooler soon.