A two LED flasher is about as simple as it gets.
Note: Circuit and firmware now available
A simple LED flasher is a good project to get started with AVRs. This ATtiny13 based circuit alternately flashes 2 LEDs (or however you want them flashed).
There are a couple of simple SMD components which should cause no problems if you use flux on the board first, and good SMD techniques.
Here are images of the schematic and board:
These were produced using the free version of Cadsoft’s Eagle PCB program.
The actual schematic and board layout files, along with code to run the device will be provided shortly
The circuit in Eagle format, and the firmware in C are now available here: led_flash.tar.gz