Yes I am serious! LAN mode is an available option in DX8 Beta 14 (I don't know if it was available earlier). I don't remember HTC announcing this feature, but I remember asking for it

When you choose to go to HtH, there is a checkbox for LAN mode. If you check it and you choose to create a game, your id is "hoster", if you join a game, your id is "userX" where X is a number between 1 and 7 maybe? I have already tested it on my computers and it worked great. Now I can put an airplane on autopilot and test gunnery on a real target flying straight rather than on those drones

I think this would also be very useful for comparitive performance analysis: ie start two aircraft at same speed and altitude then put them in an autoclimb and see who climbs faster.
This has all kinds of research and training potential besides allowing for the obvious play benefits.
Now "test simulators" won't have to tie up the HTC servers with their flight sim demo (I heard it was a store where they allowed customers to fly AH hth on up to 8 computers).