Want to learn how to use an external flash with your SLR camera system? Strobist has an useful ‘Lighting 101‘ series of articles. I have also had Light: Science and Magic by Steven Biver et al. strongly recommended to me.
Since I will be getting my hands on a 430EX II flash on Wednesday, doing a bit of pre-reading seemed sensible. The first photos I produce using it should appear here sometime after I return to Ottawa on the 28th.