Circuit boards you'd love to see a new production run of

[Ghostnuke]

super off road (and track pack)

This would be a good candidate. They aren't all that common anyway, but the ones we have around all seem to be shitting themselves with no way to fix them.

 

[Arcadenut]

As much as I love my JROK Multi-Williams, if it ever breaks, I won't be able to fix it myself. Suface mounted chips and multi chips on chips gets to be a problem when they are 5+ years old as well. God forbid JROK ever leaves the hobby, how do you fix an FPGA surface mount chip? I prefer the Rotten Dog approach. Using modern dips and redesign, while keeping as close to the original design as well.
That being said, I would love to see a new set of MCR-III boards. Spy Hunter, Tapper and Discs of Tron would be well preserved for many more years.

Well, that's really a trade off. Older components mean more expensive/harder/impossible to find parts. Newer parts means cheaper(in some cases), easier to get a hold of (for now), but harder for the average person to work on.

Newer components also mean lower power usage, and less heat, which hopefully leads to a longer lasting board.

 

[dezbaz]

Lunar Lander
AR1 all versions, AR2 all versions
Battlezone
Star wars
etc etc etc