Yes,It's possible... Depending on the model... Check out this link...You may find one on Ebay also...

Hello all, I have been looking all over the internet for an answer to this question but I have yet to find one, is it possible that if you have a Palm with WiFi support that you could just use your existing home wireless internet to connect to the internet rahter than adding a data plan to your contract? I just want to be able to quickly check my email while in hotspots or my home but I do not want to spend the extra money for the data plan, hope that all makes sense. Thanks in advance!