What I miss in Thunderbird

Is the ability to display a couple of extra non-standard headers in addition to the usual From, Subject and Date stuff.

I know I can turn on all the headers, but that's just a bit too much noise.

Maybe someone out there can write an extension for that?

[PS: I know this isn't strictly PHP based, but since I spend a lot of time managing the php.net mail server, I guess it could be construed as PHP].