Hmm.. Web stuff definitely isn't my territory, but I have a little experience with databases. Unless you can somehow dump their Database from the site (Which I'm sure they have secured.) I don't see this being possible.. Unless you want to get it a non-legitimate way.. Using SQL injection, but I'm certainly not going to go into detail about that as it's illegal..
As I've said, web related things aren't my territory, but that's what knowledge I have of databases. If anyone else knows a way, that's great.