bought recently a Samsung Galaxy GT-I5801 and configured my favourite wireless networks without a problem. They all worked.
2 days ago, i can still connect to every other network except at my home.
a) My wireless network has ssid hidden, mac filter and WEP key
b) my computers connect to that same network without a problem
c) my phone connects to others networks
When i try to connect and it's trying to get an ip address, it says it is "out of range" (i don't know if that's the translation, in Portuguese is "fora de intervalo")
HTC Desire, Google Nexus 1 and Sony Erricson Xperia X10 are the best phones on the market atm by far. The Desire and x10 will both get android 2.1 update around september which will get some lovely new features.