Has anyone seen a decent nightfighter sim? Something in a Mosquito or Beau..?

Nothing on that front, Gordon. There's been discussions about the
subject and while it would be quite easy to put the right planes into
night skies, everything else is way harder to make.

Radar, for example. It would be immensely hard to make a radar display
that works like the original. Having computer voice give you corrections
from "his" radar display could work, but that would lack the feeling.
Night war was so technical, that you know, it would be mostly flying in
dark sky and not seeing anything - and that would bore 99,5% of the players.

THOUGH...

We did run a three battle long night bombers campaign on WarBirds
simualtor a few years ago. It was fantastic, though very hard.

We managed to do it with a lot of tweaking. Many interesting things
"adjusted" to make a daylight air combat sim to work in a night bomber
scenario, but it worked surprisingly well. Skipping the details, the RAF
bombers did not have any radars, RAF night intruders had partial radar
picture, Luftwaffe night fighters had no radar and Luftwaffe ground
control had full radar picture. This worked in teh in flight map, little
dots moving in the map and we limited that each and every person could
see. Very rough, not like a real radar at all but best what we could do.

Most of the planes were almost correct, some changes with sub variants,
just that the Lancaster had to be replaced by B-24.

In the end, the scenarios were amazing. The pilots flying in almost
blind, relying largely on instruments, Luftwaffe interceptors listening
to ground radar comms and trying to find the bomber streams from
blackness, me as CO of one night fighter squadron plotting the map,
moving counters on tablemap, trying to guide the night fighters around
RAF intruders hunting near airfields and yelling to the guys on radio
(real time voice comms) when they were too late making a turn or druly
commenting "scharm 3, you're in middle of bomber stream". "Control, we
don't see anything..." "Scharm 3, watch again, I repeat you are in
middle of 12+ bombers, control out".

So night bombers can be simulated in some way, in at least correct
online environment, but I don't quite see much changes for a dedicated
simulator. One was in the works by hobbyists but I think that project
has died.

Here's some info/pictures on the night bombers battle:
http://vip.mikrobitti.fi/~jukkak/wb/...ns.htm#emc15.1

jok