According to news published today at Android Community:
Google has reportedly pulled tethering apps from the Android Market. According to at least one developer, who contributed to the WiFi Tether for Root Users app, Google are citing their distribution agreements with carriers as the prompt for removal:
“Google enters into distribution agreements with device manufacturers and Authorized Carriers to place the Market software client application for the Market on Devices. These distribution agreements may require the involuntary removal of Products in violation of the Device manufacturer’s or Authorized Carrier’s terms of service” Google Developer Distribution Agreement
So, is it Android really open? I don’t think. There is not question that owning a T-Mobile G1 is not the same than owning an iPhone. At least you don’t have to run around checking for Jailbreaking tools every time that a firmware is released but you still can’t install in YOUR OWN phone whatever you want.