Hi Max,
I originally started using a Fuji Finepix 601, which is a cracking little camera, but sadly not much use for digiscoping as the construction of the camera means that it can only be hand-held up to the scope eyepiece with all the problems that gives.
Having said that, I did manage to get some shots which were not exactly masterpieces, but were recognisable and identifiable (particularly by some of the experts on this forum, who seem capable of id-ing a smear on the lens at 1000 metres!!)
A few weeks ago, I took the plunge and brought a Nikon Coolpix 4500 ( and all the other gadgets that you need to go with it) The Coolpix range of cameras seem to be the best ones for use in digiscoping, mainly because of the fact that you can screw them onto the scope eyepiece and hence eliminate movement, camera shake, vignetting etc etc.
It ain't cheap though..... so my advice would be that if you feel inclined to try digiscoping....
1. Take a deep breath - the urge may pass!
2. If you have a digital camera or can borrow one, have a try at handholding. It'll give you an idea of the pleasures and frustrations of digi-scoping.
3. If you're still keen after that, take out a bank loan and buy a Coolpix (plus gadgets) and hire a boy to carry it all around for you...
Good luck - there is a specific forum, hosted by Andy Bright, on matters digi-scoping, plus there's loads of really useful stuff on his website.
Any issues or problems, don't hesitate to ask, there's loads of experience out there and people are very helpful and friendly.