After my game totaly froze i had to send a ticket to blizzard:

My character "TissTass" is stuck in Tanaris after taking the quest "Tanaris Field Sampling" I there got a Model 4711-FTZ Power Source that I should use on a field kit. I had one from a old quest and was thinking it was the one that I maybe should use. So I activate the Model 4711-FTZ Power Source on the field testing kit and the whole game froze. I can now log in on all character I do have on both Horde and Alliance side, but the game is still frozen on that char. Help...

After been waiting for 1-2h I still didn't get any response... I just wanna play my character.. The guest is bugged or they just want me to take a break? I dunno...

Gah.. let me play.. I just got to lvl 47 *cries*