New computers don't come with parallel ports, so if you plan to get a new computer this dongle will become useless for you.
I suggest just spending $30 on a MKII programmer as an investment.
But yea, based on what you linked, it will work.
Description: AVR-PG2B is a programmer based on Atmel's AVR ISP parallel port design. It takes the power supply from target board. The connector is 2x5 pin with 0.1" step and Atmel STKxxx compatible layout.
Dimensions: 50x30 mm (2x1.3") + 20 cm (8") cable
Documents: avr-pg2b.pdf, AVR-PG2 schematic, AVR ICSP connector
Software: FREE PonyProg from Claudio Lanconelli
Supported Devices: Most Atmel AVR microcontrollers - See PonyProg for list