Can I use the Canon Speedlite 430EX II Flash for Canon Digital SLR Cameras on any Canon SLR camera?

It will work on any of the current Canon DSLRs and the oldest models going back to the EOS D30. It should also work on 35mm EOS bodies. What it probably not work with however, are the very old 35mm T-series and even older manual bodies like the AE-1 of the late 1970s.