It's ture, unless nokia release a driver for 7650, it would not work with any palm well. I keep having problme with the 7650 connect with the Clie NX70 via Ir. even I use bluetooth, I cannot make any SMS applications working. Check this out:
fun4palm FAQ - fMML
Is there support for the Nokia 7650?
Unfortunately, the Nokia 7650 cannot be used in a sensible way with funSMS. It stores incoming messages under the file "archive" where they are not accessible through the modem with AT commands. You can use the 7650 only for sending messages with the setting "Nokia 8250 infrared".
Nokia uses a proprietary protocol for their internal phone book which they do not publish to third party software developpers like us. Therefore you cannot use the special phone book features with funBOOK.