In my location 3proxy is nearly twice as fast as Netshare in the same location. I use them both because one has certain problems in Firefox, one has problems getting Hotmail or Mobileme mail, etc. So they both have good and bad points.
I even have a Sprint Expresscard but in my location 3Proxy is again about twice as fast, so I will be getting rid of the card as soon as I can get 3Proxy to work in Bootcamp Windows XP on my MBP, if that's possible.😕