Just thought I'd share in case this is useful for anyone. I've spent the last two weeks putting together a tutorial which guides you through how to code a time lapse control engine on an Arduino. I start off real slow/basic so if you are new to Arduino or not very familiar with it, this is a great starting place. It's divided into 5 parts and in the end I show how to code a system that makes use of a joystick, LCD, a button several libraries and a menu system to create a nice SMS style time lapse controller. Enjoy!
Find the first part here: http://www.photocs.net/arduino-stepper-code-basic