Burst mode.
I'd seriously recommend anyone practices by shooting planes in poor light conditions regardless of the camera they use, and experiments with burst
mode. So if you're reading this and own a camera try it

. If you can take pictures of identified flying objects in poor light, you'll have no
problem with unidentified flying objects. Know thy camera!
This applies to compact digital cameras too. Ignore the bits that don't apply to you.
I'd like to add that camera burst mode is useful as a quick fix in the absence of a flash of a flash or tripod (travelling very light). I can often
get one in four sharp shots in low light by raising a DSLR's ISO and taking bursts of shots while holding the camera still. One or two shots in a
burst maybe sharp and it's free cause it's digital. With the current batch of DSLRs (30D onward/D90/D3*/D300) they're pretty good up to ISO 3200
(although I suspect there is some in camera processing of raw files) at quite low shutter speeds.
With VR (Nikon) and IS (Canon) lenses using burst mode as a quick fix works, as you'd expect, even better.
I have tried similar things with the burst mode of compact digital cameras, my current main compact is a Canon A590IS (1.4 per second), and although
the results aren't as good as DSLR results, it's better than taking single shots. One or two may be sharp.
You can't beat a tripod though. Even for compacts digital cameras like the A590IS. I have Manfrotto tripods for my DSLRs and a cheap generic
Chinese tripod for my A590IS. The nice thing about the cheap tripod is that it is extremely light. The bad thing is that if there's a wind it's
not so good

. But for less than £10 I'm not that bothered.
But great thread! Canon biased, but then I've owned both Nikon and Canon DSLRs (and SLRs), so I think they're both great. The camera isn't as
important as the photographer in most circumstances. Like OP I tend to use 'prime' (fixed focus) lenses when quality matters (or I need low-light
performance on walkabout with something like a 50mm f1.4 or f1.8 - with the focal multiplier it's also a reasonable portrait lens). Zoom lenses tend
to be compromises.
* The D3 has a full-frame sensor (like the 1Ds mk X)and thus better low light performance. I'm told the D3x is even better.
[edit on 3-2-2009 by jackphotohobby]