Adorama has some crazy sales today. In addition to the Nikon 1 V1 kit for $399, they are also selling the Sony NEX-5N kit with 18-55 lens for $419 (regular price: $698, deal available only through this link).
Another good deal today is the Canon EOS 5D Mark II for $1,799.
Update: the kit is now sold out, but the Sony NEX-5N body only is reduced to $369.