Wow - i didn't expect this would generate quite this much response. Looks like i've made the front page of Lifehacker and various other blogs.
What is this?
This is an experimental SOCKS proxy and Port Bouncer that should allow you to connect your laptop to the internet using the internet connection (EDGE, 3G or Wifi) of your T-Mobile G1 Cellphone.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
What is this not?
It's not really a true "tethering" app. Presently we don't have access to any low level packet APIs so it's impossible (without hacking the lower levels of the phone) to write something that does the kind of NAT connection possible with Windows Mobile phones.
Who are you?
My name's Graham Stewart, I'm a 28 yr old Software Consultant in Boulder, CO. I'm also involved in various other ventures, including the news discussion aggegrator banniNation.com. I'm also a keen photographer.
Read the bit above about no warranty again. This shouldn't damage your phone, but if it does, it's your own fault!
Install the app on your android phone, by clicking here (from your phone browser of course) You might have to change your settings to permit apps that don't come from the Google Market by going to your home screen and choosing MENU > Settings > Applications > Unknown Sources.
Turn USB debugging on on your phone On your G1 go to the home screen, press MENU > Settings > Applications > Development, then enable USB debugging.
Follow the instructions here to install the Android driver - you'll need to do this on Windows & Linux but apparently not on the Mac.
Download and install the Android SDK for your computer platform. Alternatively if you are on Windows and don't want a 100 meg download, just get the ADB utility from here
Plug your phone into your computer
Using the Socks Proxy
The SOCKS proxy will let you connect things like firefox to the internet
Choose Tetherbot from your phone's menu
Press the "Start Socks" button on your phone
Move to the directory that has the adb utility, using inside the Sdk Tools folder and run