I like thez' idea.
A plugin that creates a window you can place clickies in would be cool, when you click it it moves it from bag to where it needs to go etc. This can be done other ways an I do it but a plugin to make it more GUI style would be cool. This could also be a way to cheat those extra 2 potion slots too. Not really unlock them, just a behind the scenes switch to make it work.
A plugin that lets to filter spam a bit more personally. I only want to see backstabs or everyone's hits over 1000, or when I get a tell from sexy high elf chick it's in red and not the usual orange. Maybe even a way to say /ooc goes in the spam box when I'm in POK.
A few other things that would be cool is just updates to plugins already here. MQ2Map should filter out PCs in the bazaar and npcs in undershore by default. Also suggest /hailt and /sayt and /give should all warp you to behind the mob not right on top of the mob, so that sneak classes and races can do their stuff.