For anyone who is interested, here's the standalone version of my automatic nuke ping mod (see http://www.faforever.com/forums/viewtopic.php?f=2&t=1439). I've used non-destructive hooking, so this should be compatible with FAF and most other mods. It's not a UI mod, so all players in a game will have to have it installed in order for it to work. If you run across any bugs, please let me know (and post the game log).
Mod Summary:
When a nuke is fired, this mod automatically creates a ping (similar to the attack, move, and attention pings) at the nuke target location. Pings are sent to allies only, so enemies will still be in the dark. The mod has a built in filter for multiple nukes at the same location, so it should be good for nuke spam games as well.
Installation instructions are in the zip file.