I want to setup a Bukkit server for Minecraft and I wonder whether there is any multiplayer plugin which automatically "refills" your equipped item stack if possible. That is, assume you build something and are out of wood, but if you got another stack in your inventory it will automatically be placed in your hands so you can work on seamlessly.
There is a mod to do this, but it's not a Bukkit plugin. Inventory Tweaks is a client-side mod that works in multiplayer as well (it's used by the client-side install of Tekkit, for example.) It will automatically refill your hotbar items when they empty/break, among other things:
Since it's client-side, you and your players will have to install it individually.