I can't say how it works as it doesn't arrive until Monday, but I just ordered one of these from digikey.com.
Admittedly it's not really a "desktop" antenna, but it does cover the 700-800Mhz band with 3db gain.
My plan is to see how it works inside, and if that doesn't get the job done for the system I'm trying to pull in, I'll put it up outside. I figure it has to be better than the cheap telescopic whips that I'm working with now.