It's just not smart to short stocks like these unless you're sure there is some bad news coming their way... they are very speculative and get a lot of media attention and jump up defying logic... In the long run, if the stock is overvalued it will eventually go down, but there's no sense in trying to short this stock in the short term. Basically, you're trying to predict the outcome of a popularity contest. You might as well goto the casino and put some money on red and at least get a few free drinks instead of paying commission.
You short APPLE after me post here over and over "Don't B Stupid When It Come To Apple" http://www.elitetrader.com/vb/showthread.php?s=&threadid=99609 You no listen 2 me, me genius!!!! Now u sorry.