I've been a part of this facebook group for a few weeks, and the creator just initiated a monthly campaign to email/tweet/facebook message Konami to try and at least get Suikoden 1 and 2 posted worldwide on PSN. The further reaching goal is to get a real next entry in the series, in the same world as 1-5. The movement just got some press on Destructoid which has been spread to some other gaming news outlets.
http://www.destructoid.com/fans-peti...e-236132.phtml
and their facebook page is here, if you like Suikoden and haven't joined yet, please do so!
https://www.facebook.com/SuikodenRevival
I know that fan campaigns never seem to do much, but it can't hurt to try.