Digispark Kickstarter Attiny85 Arduino Mini USB Micro Development Board
The Digispark is an Attiny85 based microcontroller development board similar to the line, only cheaper, smaller, and a bit less powerful. With a whole host of shields to extend its functionality and the ability to use the familiar IDE the Digispark is a great way to jump into electronics, or perfect for when an is too big or too much.
The Digispark is shipped fully assembled except for the two included and easy to solder headers.
Here are the specs:
Support for the IDE 1.0+ (OSX/Win/Linux)
Power via USB or External Source – 5v or 7-35v (12v or less recommended, automatic selection)
On-board 500ma 5V Regulator
Built-in USB
6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB)
8k Flash Memory (about 6k after bootloader)
I2C and SPI (vis USI)
PWM on 3 pins (more possible with Software PWM)
ADC on 4 pins
Power LED and Test/Status LED

Features :
High Performance, Low Power AVR® 8-Bit Microcontroller
Non-volatile Program and Data Memories
8K Bytes of In-System Programmable Program Memory Flash
Endurance: 10,000 Write/Erase Cycles
512 Bytes In-System Programmable EEPROM
512 Bytes Internal SRAM
Package Includes :
1 x Digispark ATTINY85 Mini USB Development Board
1 x Berg Pin