I'm requesting a plugin that disables Creeper explosions either all together, or above a certain altitude.
Seeing as how the hMod forum is all but obliterated, such a task would seem nearly impossible. If you would be willing to, I don't see how it would be difficult it would be to nerf Creepers.
The guy who coded this originally was a French speaking RP'er bsed on the user profile on hey0; His site is freely available and the hey0 forum thread for this hey0 mod plugin is freely available via a google search despite being moved to the "old" section there. I took 2 seconds and I found it. In addition, a search on THIS forum shows that plugins this man wrote - like griefalert and worldguard - will be ported to bukkit. I highly doubt he would port two large plugins but not a third smaller one.