I just got back from an 8 day trip yesterday and never did get to ride Everest. First of all the Animal Kingdom is by far the most crowded park right now. The lines for Everest are 90 min. minimum from about 1 hour after opening and the fast passess run out completely by noon. Get there right at opening or earlier and if you can't, just wait in the 90+minute line or you'll never ride it. I refused to wait and was never able to get a fast pass so I'll save it for the next time.

We waited almost 2 hours at the DVC member event after flying down from NY for the weekend just to experience EE in January.
EE was kewl but now that I've done it a few times - 30 minutes is the most I'll wait. Awesome views of EPCOT and MGM from the top.