Dan,
I think this subject should have rather been somewhere in "Andy Bright's Digiscoping Forum". My lengthy answer does not tell much about photograpy technique, but here is it anyway.
The Pana FX01 is practically the same camera as the Leica C-Lux1, which works perfectly with the Leica adapter. I am also quite confident that all Canon Ixus models and the Fuji F30 should work with it - as should many other compact cameras. I have a Swaro scope, a 20x wide-angle eyepiece and a Baader/Scopetronics platform adapter - it works, but there are much better adapters available (eg. Leica's, Zeiss's & SRB Griturn's in the UK). My FX01 produces nice prints and is OK for me, but I would advice everyone - before purchasing - to check that they can live with its heavy processing and noise that can be easily seen if you are into pixel-peeping
.
From your listed camera models I would think that the Nikon 8400 probably has the best image quality. It also has a fast electronic viewfinder, which seems to work even in flight photography. Its drawbacks are slightly short tele end, large size and a requirement of good eye-relief (but the Leica eyepieces should provide you with that).
Nikon 990/995 - Oh for god's sake, NO!
Nikon P4 - Why not. Some have commented that its pics tend to be "soft" in spite of high pixel resolution.
Sony W7 - OK, as are the W40...W100, N1, N2...
Canon SD800IS - this is what I would seriously consider today... never tested myself though.
Fuji F30 - Sharp optics, great sensor, good display, superior low-light performance and battery life. Some ergonomical quirks and noticeable image processing, but the important basics are handled very well. There is a reason why many professionals use this as their pocket camera.
There you go, you can digiscope with any of these with your Leica. Just think about *your* needs, pick a camera and see how it works - if you are not happy, you probably know a lot more about what you would have wanted.
Best of luck, :t:
Ilkka