I know this is from last year but others might find this useful.
The code and method has been migrated to Arduino 1. it also supports the attiny45/85 and the 44/84
I have started using these for some of my smaller projects that an Arduino is just a waste for.
I am setting up an array of house temperature sensors I am using the attiny85 with a DHT11 temp/humidity sensor and a simple 433mhz transmitter.
it runs off batteries and a small 5v boost regulator from Pololu.
So yeah if anyone has some small projects that only need 3-4 io pins and wants to use the arduino platform then give the attiny85 a look for abit more io the attiny84