I played on a server today that used this. While we don't know how it's going to be affected by Sunday's update, I'd highly recommend we use the hey0 mod and some of the plugins. The server I played on had a variety of features, including the ability to /sethome to relocate individual spawn points (but which doesn't affect compasses—they still point to the original spawn), /warp to teleport players to any location an admin has keyworded, player privileges which prevent unsolicited visitors from being able to access the contents of chests or destroy any existing blocks, rollback commands to either restore the entire server or selected portions, the admin ability to move entire pieces of landscape, an admin command to remove all TNT in an N-block radius, and more. It seems like the sort of thing we could really use.
I run this mod/plugin
The tnt removal is probably part of the Cuboid Plugin. I'm not sure what they're doing for rolling back part of the world unless that's also Cuboid -- you can select areas 3D cubes of any size and save them, copy them, paste them, delete them, whatever. It also lets you make spheres of any size, cylinders and disks. It's actually incredibly useful. It also lets you lock chests I think and create area ownership with either single user rights or group priveleges
Other plugins for hey0's mod that are useful: CraftIRC, which runs an IRC relay -- I make the dev add something in every week or so;
QuickPort, which lets you hop around a map using a compass
There's something that makes dynamic signs but I forget what it is -- basically they tell you game time, irl time, or can warp you (ie, Click here to go to SUPERDUNGEON).
There's also in an game email plugin and one that forces the server to loop a certain time interval, ie day or twilight or whatever
all in all I recommend you guys use hey0's mod; it's got a ton of shit built in by default and the plugins make it invaluable. Plus it's probably the only mod that is good enough to use /commands rather than !commands so people doing shit doesn't spam the fucking chat
Setting it up is a bit weird at first but it makes sense once you look at it long enough