I used to in the summer of 99 when it was feasible for retail investors. I had accounts with etrade and wit capital(anyone remember them?). I was able to get 100 share allocations of etoys, iturf, ivillage, goldman sachs, plus some others. It was good while it lasted.
Guys in my office used to short IPOs for a living until the nasdaq pressured our exchange and clearing firm.
Hoping market picks up again, but there are always a few IPO's that do well here and there. People do it for a living. Baidu was hot, so were a few others. CBOT ipo comes out soon.
I heard that you can't short IPO's immediately, becasuse no one is willing to lend you the shares. But I'm sure people are shortign Baidu, for sure!