IP didn't work right for me.
I'd be interested in seeing a minecraft server with mcmmo with areas where you're totally free to mine and build and stuff, then large areas where its like towny with npcs. Just don't make it a hub server or a plain old factions server, be original!
Also if you wanted to know what plugins could make the idea I mentioned possible, try:
mcmmo, towny, citizens or shopkeepers. If you get citizens, also get sentry and quests, these two plugins expand citizens and allow you to create quests and other interesting npc things.
Good luck with the server, if you ever need a tip or are just bored, stop by my server! Click my profile to learn about my server.