So, on the current SMP server, I'm constantly just running out of interesting and fun things to do, that's no the servers fault though, it's just simply at the amount of content Minecraft has implemented, there's an easy solution to this. Mods.
Now, yes, you can play modded version of Minecraft on others servers or heck even in single player, but having a modded server from Hawknet adds the community from the current servers to a new one because let's be honest, playing with friends is always better than playing alone or with strangers.
And another good point about Feed the Beast/Tekkit is that there is multiple mod packs to install so heck, Hawknet could even just go off and create a specifically tailored mod-pack to suit the server, though would be a lot harder than just getting a preexisting one, but it's still an option; but personally I'd most likely go for preexisting ones, such as these;
http://www.feed-the-beast.com/mod-pack/mindcrack (was a personal favorite, currently outdated, pending a big update.)http://www.feed-the-beast.com/mod-pack/ftb-ultimatehttp://www.feed-the-beast.com/mod-pack/unleashedA big plus to these new mod-packs is also the easy accessibility of them, so instead of having to do the big hastle of opening jar files and moving files around, it's all done for you, this basically eliminates one of the problems with the older SMP modded server thus getting more people to come and play on the server.
So overall, I think it'd be pretty damn nice to have a FTB/Tekkit server along with the good ol' Hawknet community.
http://www.feed-the-beast.com/http://www.technicpack.net/tekkit/