The single most important thing you can do to get rid of red eye and insure that your flash photography subjects don't have that flat, pasty-faced, deer-caught-in-the-headlights look is to seperate the camera from the flash. (You'll need Canon's off-camera extension cord for this) You can shoot with the camera in one hand and hold the flash in the other, or use a bracket to hold them. Or you can get creative, bouncing the flash off the walls, lighting behind your subject, etc. It's great for providing fill flash on sunny days, lighting shadows- and with digital cameras it costs you next to nothing to experiment with lighting and get immidiate feedback.

The 220 talks to all the G-series cameras (as well as all modern Canon SLRs) so you can concentrate on lighting and composition and let the camera worry about exposure. Add a couple sets of rechargeable AA cells and a small charger- cheap these days- and you have an inexpensive but powerful lighting studio. Some may recoil at the price- after all, you can get a tiny flash unit for half or a quarter the cost- but the ability to integrate withe the camera electronics are well worth it.