Just set up a new Acer Aspire One netbook (damn nice machine BTW, only $320 delivered from PC Connection for the slim version with extended battery, plus $25 to upgrade the memory to 2 GB) for a friend to use while traveling.
The friend just called me from the hotel because of "limited connectivity". Turned out the hotel uses WPA, which is good, but was a bit vague about the key (PSK), which my friend entered in upper case since the network SSID was in upper case (!), which didn't work because the real key is lower case.
My bitch is about the stupid "limited connectivity" message from Windows XP -- it should clearly report that the key didn't match so real people would have some clue what to do.