Hope you have a backup. Been playing today, also been inspecting port prosperity. The shop has been plundered, several buildings, including your huge-ass pvp stadium, have been blown to pieces by some player(s) (leftover TNT blocks prove that) and those creepers certainly are doing their job, too. It's kinda like a post-apocalyptic version of what we all built up. I've also been talking to some of the guys there, they'd all like to start a whole new world. However, that's just an idea crawling around our minds, that's all.

Edit: dang, I've just read your post about the backup... Oh well. But it's a darn shame, really.