I'm like brand new to the whole Minecraft hosting and server administration part..

I love Minecraft and I want to really let my players suggestions happen but have no idea where to start!

I've got CraftBukkit 1.2.4 #180 and I have at the moment two maps uploaded, one called world and one called world2, I can let users go to worlds if I set in server properties the world = world or world = world2 and restart, but I want users to be freely able to change between the folders/worlds without my interaction.

A few other things they want if anyone could point me at a plugin - 

Player1: I would like a world to myself where only I can be an OP and I can change it between survival/creative and allowing and not allowing TNT and where I can OP people in my old world.

Player 2: I would like to have my house in the main world map but I would like to protect people from touching it, building on it or breaking it.

So yeah if anyone can help I'd be very thankful, basically I need a plugin or pointed in the direction to allow multiple worlds, where people can be op in specific worlds, also one to protect or stop others from touching others creations in the main map! (Also say player1 has player1 as his world (no one else should be able to build here)

Sorry I'm going on but I'd really like this