This plugin is an extension for the ever so popular BattleArena. It adds "freeze" effects to entities that are hit by a snowball. Basically, when ever an entity (player, monster, animal, etc) is hit by a snowball it receives a (soon configurable) level and duration of slowness. (Note, this plugin works outside of Arenas as well)
Commands for configuration purposes coming in v2.0
The only thing configurable right now is the duration that players are frozen for, in ticks (20 ticks = 1 second)
If you have any questions, need help, or have any issues with this plugin please submit a ticket on Bukkit. Additionally, you can find me on the Esper IRC network on the #battledev channel.
http://www.github.com/zach443/battlefreeze