I rarely short, though I do feel it is a legitimate trading technique. Never fall in love with a stock is one of my favorite proverbs. That being said, outside of the scenario you drew of going in and out over the course of a day or two, or a general market meltdown, I believe you are making a serious error in thinking that Handspring is becoming overvalued and will soon be under long term selling pressure. The announcement of the Visorphone was a seminal event (excellent second article in today's WSJ), and by today's standards a marketcap of 10 billion dollars, which Handspring is still under, is relatively cheap for a company with such tremendous growth prospects in a huge market. Good luck, I'll be interested in seeing how you do.