This is the speed-upgraded version of the ATmega323L. The AVR series of microcontrollers are right up there with Microchip PIC products.
The popular ATmega48 series offers low-voltage operation, with excellent features!
Looking for Atmel AVR microcontrollers? We've got them! They're really, really good. Truly. And pretty inexpensive, too! Solarbotics has bags of them. Well protected, anti-static bags of them!