Just to revise my required list (and to ask a related question).
Two Choices... (all assuming suitable power will be available)
Absolutely Required:
1 x ATmega328 with Arduino bootloader
1 x 0.01µF Ceramic Capacitors (power)
1 x 10k resistor (auto-reset)
Crystal Option:
1 x 16MHz crystal
2 x 22pF Capacitors (crystal)
Resonator Option:
1 x 16MHz ceramic resonator
My Question: Is there a benefit to using a "real" crystal, as opposed to a resonator? (running with the internal does not impress me much, as timing would and could be important depending on the application). Is one more accurate over the other? or is it just down to cost...
Sorry for the constant questioning for what is probably a simple thing for most intermediate and above users. I have seen tons of breadboard/simple/basic/onchip/etc examples of arduino's and a large part variation, I just wanted to make sure I understand things before I order a dozen or so sets.
Thanks again!