You know the forgeBukkit Project is nearly dead so it is halted so tekkit is stuck in 3.1.2 at the moment
Many servers with mods dont use bukkit which makes all modded servers private so they cant use factions,towny etc
They can mod the clients but cant mod bukkit because of the forgeBukkit project has stopped
And they cant update because ee2 is dead but ee3 replcaced it but all there red matter would be usless
If you want them to update tekkit somone needs to cretate some forge---------.jar that will accept plugins that are coded in java only java
EvilSeth,CPW and LexManos are working on it but it might become dead so help them or adbannen ForgeBukkit and make a more supreme setup