Unless PhotoPass has raised their prices, for a DLR CD, it should be $59.95 + $7.00 shipping (or more if being shipped internationally), for a total of $66.95. That is what the price was both in October and December of 2008, when I last ordered a CD. And when you order one CD, if you want an extra one at the same time, they charge an additional $19.95. Now, there are some folks who have gone to both WDW and DLR within the same time frame and have put both sets of pictures on one PhotoPass account, and sometimes PP will tell you at first that the price will be what the WDW cost is ($129.95, I think?), but then it should adjust itself to the lower DLR price when the transaction is being completed in check-out.
Pre-ordering really only makes sense for WDW, because you can save money that way. But for DLR, it makes much more sense to just edit your pictures and order the CD after your trip is completed, because you save money that way. Actually, I didn't even realize that pre-ordering a DLR PhotoPass CD was possible anymore. I thought it was possible at one time, but I didn't know you still could do that. If that's accurate, it doesn't make any sense to do it that way.