BB has a 1G stick available for preorder, $159.99. I've looked at some other online sites in search of other 1G sticks but couldn't find any. Has anyone else, who's looking to upgrade to 1G for their PSP, found a better deal than this?
A dude over at cheapassgamer.com listed some places your could find one for $106. I would give you a link but the forums seem to be down at the moment.