Here at the gdgt party, Lenovo introduced an all-in-one nettop we haven’t seen before: The IdeaCentre C100 is an Atom-based, 20-inch nettop that will eventually pack Windows 7 and a touchscreen, but it’ll have touchless Vista first.

The IdeaCentre C100 is a 20-inch all-in-one that’ll launch at a price point of, as the Lenovo people told me, “around $400.” It’ll have a 1.6GHz Atom, 1 or 2GB of RAM, a DVD burner and an 80GB-160GB HDD. Interestingly, the webcam and WiFi are both optional, which we suppose is one way to keep the price down.

The demo unit I saw was running Windows 7, but I was informed that they’ll be releasing it this month with Windows Vista and without a touchscreen, even though the unit is dying for one. They’ll be releasing a touch-optimized Windows 7 version come the OS’s release in October, but the price will go up to accommodate the change. We’ll update this post with more exact info when we get it, especially a specific price and release date. [Lenovo]