Is there any way to get a a mod like this onto a smp: http://www.minecraftforum.net/viewtopic.php?f=25&t=76129 This would help my server so much
Hm.. we made it like this on our server: use an item you can't get that easily and not that much(so they are very limited) e.g. jukebox CDs and get Cookbook -> make a crafting recipe so you can change something into money. you could make that every item is worth an amount of CDs or that you can make it only out of gold ingots.
Just read the linked thread: "This works in SMP as far as I can tell (using localhost) right now" Requires a client-side mod for every player, but it's still a start.