So happens I was invited to a seminar on Digiscoping last summer put on by Nikon. Here is a link to some of their toys:
What Nikon has going for them is they build both the spotting scope, camera and ideal interface device. Makes for almost fool-proof imaging. I have all of their lenses, a camera and scope and it is a slick system. Plus you can use the camera for your kid's birthdays and the spotter for hunting.
They are going to sell two kits, all ready to go. They make two sizes of ED Fieldscopes and fit two digital cameras to them, about a 5 and 7 meg or maybe higher now since it is a few months since the seminar.
I can take some images of the digiscoping system and pass them on if you wish. Trick is they have a special digiscoping lens on the spotting scope that has a massive groove in its outer shell for locking the interface to. The camera fits like a glove in the interface. I manged to break off the cable release but replaced it easily.
Good luck with your decision - the Field Scopes are incredible spotting scopes by the way.
Going for a drive next week.