Yes, I also have constant WiFi problems with the Iconia W3. I carried it to the Help Desk at Build 5 times during the conference, only to be told it was just because the network was oversaturated. I explained that I had the same results at the hotel, but that didn't matter to them.
Now I have the same issues at home and at the office. My laptops, Surface, and iPhone all work great, but Iconia's WiFi sucks.
Not much good to me, so I have repackaged it all and will give to my 10 year old for Christmas.