I have an idea for a PvP map for the Ultimate pack. It will probably use IC2, Thaumcraft, Secret Rooms, RedPower 2, maybe Mystcraft, and maybe some other mods. Post if you have any ideas and I will start building it soon!
A FTB pvp map would be nice. Classes would be nice and I like the idea of secret rooms. You could also make good use of Portal gun and maybe Gravity Gun. Modular Power Suits and Computer-Craft if you can use it would also work nicely. The real trick would be balancing the classes if you decide to add some. If you need help I'd be happy to help you.
I was thinking of two teams that each have a fortress, but I like the idea of portal guns, Modular PowerSuits, & computercraft. What I would need help w/ is redstone & command blocks. Maybe the goal would be to get the passcode for a room that if you get in, you win.
That's a cool idea. Maybe their could be other maps with different goals like CTF or team death-match. To me, its hard to have a effective pvp map without classes or else everyone would be the same.
I was thinking about getting a server up so I can work on a map and this one might be it.