Building on an earlier discussion, I believe there would be immense benefit to everyone to add land rental functionality to the server side of Second Life. As a first step, I propose that land for rent be displayed in fuchsia (magenta) on the main map, similar to the way in which land for sale is displayed in yellow.
Later, the entire rental process could be integrated with parcel settings (About Land) as part of an upgrade of parcel and group permissions. Doing so would create an open and accessible rental market across Second Life – beneficial to landlords and tenants – that would enhance the overall economy. It would also eliminate much confusion regarding land rentals on private estates.