I wouldn't expect the 1D to drop much - one this has over the 1ds is speed, and for many photojournalist apps, this and smaller file size are big plusses - I think the 1D will have a market at its current price point for another 12-18 months at least.
I suspect you will see few, if any, price changes in cameras aimed at a particular market. It's like computers - the current decent model for home use is always around £1000 - you get more bang for your buck each year, but the market seems happy with spending £1000 for a new computer. Likewise, I think Canon/Nikon et al. have figured pros will spend £5K, serious amateurs £2k - and I think we'll see a succession of models in these price brackets.
Furthermore, it seems the manufacters have been careful to ensure that demand exceeds supply, so it is unlikely we will see many of "last years models" gathering dust on the shelves - there will be bargains to be had if you're very lucky (as when the D30 was superceded by the D60), but there weren't really enough D30s waiting to be bought to generate a significant slash in price. The 1Ds is likely to split the market ... but the market is rapidly growing and Canon will, I think, produce appropriate numbers of each camera in parallel.
What we may see in a while is a "dumbed down" D60 with possibly the same sensor but less camera features at under 1k - D600 ?
Of course what will emerge is a used market for DSLRs. Not sure how viable this would be - while I would have no problem buying a used mechanical camera (I can easily check and test this), a used DSLR is another matter.
Colin K. Work, Pixstel