What we're most excited about with the new Canon EOS XSi is the two flavors of Live View focusing. Live Mode is Contrast-based and like it sounds, works without any viewfinder blackout. The focus point can be selected from all but the very edges of the frame, all in real time, without any blackout while the mirror flips about. Quick Mode is, as it sounds, generally quicker, and works off the phase detection AF points, and does involve a momentary LCD blackout, but when it pops back on, the shot is nice and sharply previewed. Final specs on the Live View autofocus functionality via EOS Utility when the XSi is tethered to a computer aren't yet available, but we expect to see some flavor of remote focusing via computer interface.