an odd requirement
Over the weekend, I setup my daughter's new Dell Axim X30 to her Airport AP. I also had my SX66 along, so I had a sanity check (I had successfully got it connected to my DLINK AP with WEP). Getting WEP to work to the Airport was frustrating. It would work great to the MAC and another WinTel notebook she owns, but the PPC would not work. When I would try to use WEP, it would show successful WiFi connection to the Airport AP, but NO browser or any other Web functions would work. After a couple of hours of futzing with it, I decided to see if the HEX key just might be case sensitive (I had been using lower case alpha as it had work fine with my DLINK AP). Well for reasons that I still don't understand, entering the 128bit HEX WEP key using UPPER case alpha characters did the trick. For a sanity check, I tried using lower case again and once again, connections worked, but no actual internet connectivity. BTW, I had the Airport set to OPEN and NO MAC filtering while I was fighting the WEP issue. After I discovered the case sensitive nature of the Airport, I was then able to turn on MAC filtering. I never did get the closed network capability of the Airport to work with the PPC, but with WEP and MAC filtering, she was pretty well secured.
I still would like to know why the PPC would show successful WiFi connections with a WEP key containing lower case alphas, but it would not allow actual internet connection while the same key with upper case alpha worked totally.