I ran a speed test while using PdaNet to tether my MacBook to my Android based LG Ally earlier today. The test showed horrible speed, but I will say that it didn't feel that bad. I was deep within a pretty thick building near a lot of mechanical equipment, so I expected not-so-great speed. But the big thing for me was that it actually worked and was usable. By the way, this test was run using Speakeasy Speed Test.