Hi N,
I agree that the attiny85 is really cheap and nice :). i have one on a breadboard now, with VCC, GND, RESET, thermoCoupleHighPin, thermoCoupleLowPin, controlPin, serialOutPin, serialInPin; all pins used.
But I would like a phaseDetectPin also :(.
And to program the attiny85, I have to rewire three pins so the arduino-ISP can drive the SPI pins.
So four more IOs would be nice. I thought about the attiny84a - which is a 14pin dip - almost perfect.
But for playing on a breadboard, a few more pins dont hurt, and the bigger gain on the ADC is nice.
So I suggested the more flexible attiny861a :).
Anyway, I would like two attiny861a - even at that high unit price - *grin*
Dave