I have a bunch of ideas, here's some as I'm too lazy to post them all with full features etc..
Referral Club
Basically, what this is, is a group that users can join, or something along those lines, and they can check their own progress. Instead of that other useless referral thing. Say when they join the group, their name gets insterted into a cms_referral_group table, which has the columns
| USERNAMES / USERID | REFERRAL COUNT | PACKAGE |
The package column doesn't really need to be there, but it most likely would save ram usage as it wouldn't have to have a query everytime the page loads to check how many referred users there are.
Anways, onto the package idea. As the user gets more users, they could receive rare packages, maybe even with some credits thrown in there, and of course a special referral badge. Not the gay alligator shit.
If you're feeling ritzy, you could even add a housekeeping page where you can configure the rares included in the package, and an optional 15x15 image to go into the package description table, to show what package it is.
This is just one of the millions of ideas I've had. I've been striving to start a hotel with a good economy, as there isn't one right now that I know of that has one. It goes along with my overall idea of a hotel of hierarchy, and you achieve different status' in the hotel.
If anyone is interested in creating this hotel with me, add my msn
crazymellor@hotmail.com - It's already in the works, but needs some more help.