Music/racing game Audiosurf never made it to the iPhone, unfortunately, but its developers are apparently hard at work anyway. They've launched a website for something called Audiosurf Air, which is presumably a sequel to the tune-riding title.

There are a few screenshots on the site, and while there is a disclaimer that they're not final at all, they do look about like you'd imagine a sequel to Audiosurf to look. There's also a beta signup, so if you're interested, you can enter your email and presumably get a chance to play it at some point. We'll keep our ears open and our headphones plugged in for more news to come.