Ordering Parts for an Arduino-Based KAP Rig

I've wanted to do Kite Aerial Photography (KAP) for some time, but it seemed a little daunting.  But now that I've got some Arduino experience under my belt, it actually seems quite simple!  So I've got a cheap-o little digital camera from the drug store, here.  And my friend Sven just checked my parts list for the bits that'll let an Arduino short the shutter button to snap photos:

• D1 is a 1N4004 ($0.99)
• R1 is just a 1K ohm resistor ($0.99)
• Q1 is a 2N2222 ($0.55)
• K1 is this relay from SparkFun ($1.95)

So once the parts arrive, we'll see if these codes are worth the price we paid.  (Under five bucks!)  "I don't know -- fly casual..."