Use a teensy++ 2.0 (AT90USB1286) as the arduino-side of an arduino yun

Hi, I use an arduino yun for a project and ran out of flash on the 32u4-side for my sketch. Do you think it would be possible to replace the 32u4 with another microcontroller like a teensy++ 2.0 (AT90USB1286) - simply connecting the AT90USB1286 over it's UART to pins 0 and 1 of the arduino yun (AR9331). Has anyone done it? Thanks for sharing your experience!
Best regards, Dani

Solved: Paul Stoffregen has been of great help with this: Check out Combining teensies with the Arduino Yun. Dani