I guess that some are interested, so; Philips Semiconductors today
announced a new Flash microcontroller family, the  P89C51Rx2, broadening
its current Flash 80C51-based microcontroller offering. The new family
of devices (up to 64k Flash and 20MHz) features a 2X-speed mode, where
the clock is divided by 6, instead of the standard 12, thus minimizing
Electro-Magnetic Interference (EMI) and reducing power consumption. In
addition to In-System Programming (ISP), the devices also enable
In-Application Programmingú (IAP), a capability that allows designers to
change the code within the application while it is running. More
information?
http://www-us.semiconductors.com/pip/89C51RB2_89C51RC2_89C51RD2_1