I assume you got the straight eyepiece version of the scope, which is a bit better for digiscoping.  You'll need an attachment such as the Nikon FSA-L1 in order to attach your D70 to the scope.  Keep in mind though that using an attachment like this basically turns your scope into a long telephoto lens that is rigidly attached to your camera.  It's focal length is something like 1500mm with an equivalent F-stop of f/13.  In photographic terms that means very high magnification, but a pretty dim image unless you have good lighting. 

The good news is that Nikon D-SLRs handle low light shooting pretty well, but even so you may end up with some longer shutter speeds, which will increase the tendency to get blurry pictures.  This is a common problem with digiscoping that is best solved by shooting in good light, from a solid platform.

Speaking of which... plunking a relatively heavy camera body on the end of the spotting scope will, at the very least, throw off the center of balance on the scope/camera combination.  Some light-weight tripods are not up to the task of supporting that kind of weight imbalance.  There are some solutions such as special brackets that support both the camera and the scope, but these can cost several hundred dollars.  If you're handy you can buy the hardware to make your own bracket-- I did that for my Canon camera and Kowa scope; it cost me about $30USD instead of the $300 I'd have paid for Kowa's custom bracket, but that kind of work isn't everyone's cup of tea.

You may actually want to consider using a smaller point/shoot camera for your digiscoping activity.  A lightweight digital camera with none-to-moderate zoom capability (say 3x or so) can work very well.  There are lightweight brackets that align the camera with the scope's eyepiece so you don't have to hold it yourself.  Some brackets are even set up so that the camera can be swung into place for a digiscoped shot then quickly swung out of the way when you want to view your target through the scope's eyepiece.  Another advantage to this setup is that you don't need to remove the scope's eyepiece in order to attach the camera.  When using the D-SLR setup the camera basically replaces the eyepiece, so you can't really use the scope as just a scope while the camera is attached; it really is more like having a camera with a long telephoto lens at that point.

Here's a nice digiscoping setup for the ED82 using a Nikon Coolpix camera (widely regarded as an excellent digiscoping camera). You can see the author's results using this setup in his Flikr photostream

Regardless of what options you choose, the most important thing for digiscoping is practice practice practice!  As Aafke and Bonnie have both noted, it takes some experience to develop good digiscoping technique.  The good news is that you can shoot as many pictures as you want with the digital camera and just delete the bad ones.

Good luck!

Good catch Carol, and nice video too.

[The Incredibles]

I like the z980 even more.  24x optical zoom with image stabilization for under $400 USD??? 

In the words of the neighbor kid in The Incredibles, That's WICKED!!!

I meant to post this earlier...

My Rochester falcon landmarks map



I moved the marker to what I think is the building Mariah was seen on.  You can see how close the river is...looks very falcon friendly!

Cool, first thumbnail!  Just a little south of the Research labs the river gorge is just about as deep as it is by the High Falls.  There's a pedestrian bridge over the river that links up with the Seneca Park Zoo and a nice walking trail.  There's plenty of places for falcon & fledge watchers too (if I can engage in a bit of hopeful thinking for next year).

It'll be interesting to see if this is a new "permanent" location for Mariah or just a perch of convenience.  Are there any plans to establish Falcon Watch North?