If you are looking at camera's in the $600 price range, any camera you find should have the analog input. I can verify from personnal ownership that the Canon ZR400(I love this camera by the way) has this. As does the ZR300, and ZR200, but I don't believe the ZR100 has this. Likewise for the Sony's. The Sony DCR-HC21 does not have anolog input but the DCR-HC32 does, and anything higher than the 32 does too. This is what separates the 21 from the 32. These cameras mentioned here are all the MiniDV format. If you are looking at a mini DVD camera, then most don't have analog input. And most DVD cameras also do not have a firewire output, so if you plan on editing footage with iMovie with a DVD camera, you simply can't. Hope this helps.
D