No, this isn't the official JJ2 website. There is no official website right now. Jazz Jackrabbit isn't even listed on Epic's website. They've dropped the series as far as we know. But this is as close as it gets to an official website. The old official website sucked, anyway.

To play online, you will want to get the 1.23 patch and the newest listserver patch. They are on J2O somewhere. Sorry I don't have a direct link. Someone else can help you with that.