This modpack completely blows Tekkit and Technic out of the water, and its SMP!
Best of all, its easy to install with the simple installer!!
Me and Texnwolf, Spitfire, and Mr.Posotive are currently doing an awesome Let's Play of this amazing modpack, and its going to be big!
Ill keep updating this post everytime an episode comes out!
Pulled from Glixyls blog about this modpack:
MODS: THX Helicopter mod, ComputerCraft 1.41, EnderStorage, ccSensors, compact solars, RedPower2, Wireless Redstone chickenbones edition with addons, BC additional pipes, advanced machines, Transformers v1.3 (BuildCraft power conversion), Forge API 3.3.152, mod_macros/keybind,immibis core, Not Enough Items with addons, Forestry, DungeonPack, Railcraft with addons, Battle Towers, Buildcraft, Mo' Creatures v3.6.2, Millenaire, IronChests, Balkon's Weapon Mod, nuclear control, modular force fields, EE2, Ropes+, ChickenCore, InvTweaks, Netherrocks, Optifine, Sphax64x texture pack modded for Revenge,BetterWorldGeneration3 (DEFAULT and Large Biomes only), Rei's Minimap with configurable LoginMessage, CustomMobSpawner, HD texture addons for various mods.
His website: http://glixyl.wordpress.com/
You can download the modpack there too, under "Downloads"