If you enter now (at article date) on Arduino.cc site you will see this message: "We are cooking something new for you." What kind of board will be? An enhanced Arduino based on ATMEL microcontroller? Or... it will be a PIC microcontroller?
For a comparison, bellow you have the original image of the site.
Anyway, on Arduino forums rumors are about an enhanced site, with the possibility to post your own tutorials and projects based on one of the Arduino boards. Who knows... maybe both, a new card and a new site.