I know, how about an elite community. One that only lets in players that are quite experienced (*ahem* and can pay the hefty rent). I the community, each citizen is allowed a house, where he may order special things in it by requesting it. Each member will be given a house according to his/her current budget. Monthly Particle can come from door to door collecting rent. Those who do not pay rent get evicted. Using this the server can develop a simple economy where experienced players can put their money stockpiles to work.
Some add-ins for the house could be like personal goblin trainers, alarm systems (that keep unwanted citizens out, allowing you to use commands to invite a friend into his/her house), and perhaps other goodies such as art sculptures, rugs, etc. All by requesting it from the admin, or, if programmed in, from the server itself!
And how about a tax system? An income tax I say! Like maybe a 15% tax to start out with. Those who do not pay their taxes can be sent to a slave mine camp where they can work off their debt.
Wow, Im just bursting with ideas tonight. If I had more time, I would make a 3 page idea report.
Thanx for readin!
*edit* o and btw, if youd like me to express more ideas, please just ask away!