The Voltz v3.0.0 beta (for MInecraft 1.6.4) will be going live today.
Be aware that this is a DESTRUCTIVE upgrade to existing worlds; please back up your save files before upgrading, as there is likely to be severe and widespread damage to your 2.0 worlds!
Mekanism, Rei's Minimap, and Immibis Microblocks are removed from this version.
Project Red, Mad Science, Rotarycraft, Open Computers, Zan's Minimap, and Resonant Induction are new this version.
Server is available at: http://mirror.technicpack.net/Technic/servers/voltz/Voltz_Server_v3.0.0.zip
To try this beta version, select the small gear icon under the Voltz image on your launcher.
And select either "Always use latest builds" or "Manually select a build", and choose build 3.0.0. Hit "Save" and enjoy the update.