Nathan, take a look at the webcam, stacking images options that can be acheived with quite cheap webcams and non tracking Dobs.
Not quite in the same league with long exposure DSO stuff but a Logitech Webcam Pro 9000 with 2.0 megapixel and USB is around the $100 mark and a cheapish way to have a go. Just investigating it myself. Check some of the threads and how to's.
You could even start with your wee Celestron. The rest is trial and error and lots of PC work with free software and advice from the great people on here.
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