The Tekkit 1 server is still up and unchanged, the Tekkit 2 server is still up, map was reset yesterday. If you managed to grab the Tekkit 2 files from their new launcher, there is a work around to play with it, otherwise, just act as though nothing has changed and continue playing on the Tekkit 1 server. Tekkit 2 is there to help foresee any other bugs, and to launch again when they rerelease it.
Biggest bug I see is the Forestry copper textures aren't being rendered properly. Also, I nearly have a stack and a half of copper, a stack of tin, and hardly any iron. Perhaps having 3 copper and tin ores each is a little off-balance? If anything, it makes inventory management and sorting systems a little more difficult.
Speaking of sorting, Is Convenient Inventory even in Tekkit2?