This forum lacks the pointless wild speculation of many, so let me ruin that with an idea about a possible replacement for the Canon D60:
A step down in price and perhaps features or at least build quality, to a purely consumer oriented "Digital Rebel or Elan", competing directly with the high end 5MP P&S models, say around the price of an Olympus E20n. "Why buy an expensive P&S with lots of dead pixel problems and no shallow depth of field option when for few dollars more you get a real SLR and access to Canon's prestigious lens collection?"
That would fit with Canon's somewhat surprising move of keeping their recently released top P&S model (G3) at 4MP and well under US$1000, and could also help to push professionals up to the D1 models who might otherwise settle for a D60 as "good enough". That is, keeping the cheapest DSLR model for the consumer SLR market only.
(Even wilder speculation: an electronic viewfinder for zooming on the focal point, no mirror lag, no mirror vibration or noise, and so on.)