I am pretty sure that all other devices (Windows, Windows Mobile, etc) associate static and dynamic IP addressing to Wi-Fi networks. I have found that connectivity to my home network works fastest when I assign a static address to the device, such as my iPod Touch. The iPod and my Windows Mobile devices seem to understand that at home I want to use static address, but if I am at a T-Mobile Hotspot I want dynamic addressing.
I have just found that Android is not as smart. I assigned a static address for home, but apparently Android thinks I want to use that same address for all networks! So while I can connect to the free Wi-Fi network in the dealership I am at, it doesn’t work until I change Android to use dynamic addressing. Apparrently while they include the ability to assign an address to the G1, they didn’t think someone would actually use it.
Notes From The Cave 