Sometimes you start a pbem game with a friend and it get stalled in the first movements. It happens usually because your opponent get busy with other duties (work, family, and so on). This happenned me recently with a game to the old classic Luftwaffe by Avalon Hill (and recently updated to 2nd Edition by Decision Games)
The game has a simple turn sequence, a mechanic that is called 'U go, I go'. I don't know if DG printed in the back of the box the rating that is showed in many Avalon Hill games (showing ratings for complexity and solitaire suitability) but if they do, they would must add a new rating called pbem suitability and rate it very high.
Although my opponent has got busy with several issues (work, family, ...) and the game is stalled in the beggining of first turn, I enjoyed remaking the board of the original gamebox module by Robert Seeley and improved by Skip Franklin.
Unhappily, we will not see a gamebox for the Luftwaffe 2nd Edition in Cyberboard (with the nice new artwork) because Decision Games still don't support Cyberboard.