I have a Clie PEG-NZ90 and have tried like crazy to Hot Sync wirelessly using the WL110 Wireless LAN card that I bought for it. I can't get the darn thing to work. I can connect to the internet with it. I can check and receive e-mail with it. I just CAN'T Hot Sync. Everytime I try, I get a message that says "[A connection could not be established between the handheld computer and your desktop]".
To HotSync, the card requires a static IP address. Many networks don't use static IPs. Our review detailed this process, check it out and see if it helps.