My Droid is the same way. Sitting at work I will have 4 bars, then 1 bar, then none, then back up to 4 bars, it's really weird. I'm on Froyo (Sapphire 0.8.4) with Basband C_01.43.01P. I've tried other basebands with the same results.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.