Why's the Members List been Disabled?

The memberlist puts a bit of a strain on the server so its been disabled.
has it been permanantly disabled? in which case why is there still a link at the top of my page. And if it's only temporary, how long will it be? It's no major problem, im just wondering as there is a completely useless link on here...
But if you had to choose between a forum without a members list that runs smoothly or one with a members list thats lagy as hell.