Many don't know this, but I am a member of the R2 Builders Club. However, I am very inactive due to lack of patience, time and money. I do love seeing fully operation Astromechs, and recently found this video of Victor Fanco's Artoo build. It's simply amazing to see the amount of time and effort put into these droids. The best part is towards the end where you start to see clips of all the great events this droid has been lucky enough to participate in. You can also check out his blog right here.