Exciting news - Version 1.0.1 now available on board manager and for manual installation.
DAC support is now in.
A working Servo library is included (see caveats in documentation)
Timekeeping bugs in 1.0.0 are now fixed (a bug in micros() caused the millis timer to lose counts in 1.0.0).
Many improvements to documentation.
Breakout/development boards are expected to be available in my Tindie store before the end of the month (the designs are already in the hands of my manufacturing partner).
Please try it out and let me know how it works out for you all! These are some really awesome parts, and I hope that more Arduino people will start playing with them. For those of us who are thinking of releasing a product based on Arduino-programmed-AVR's, the megaAVR attiny's are particularly well suited because of their low prices compared to comparable classic AVR parts - even in quantities of 1, the bare parts are available from digikey et. al. for around $1 for the top parts in these product lines!