It might be possible to make one but there are none. It's already hard to get a wallet like Mycelium to work in older OS/phones like Samsung Galaxy, so let alone Palm Centro which is older (2007).
All (or almost all, if I'm wrong) Samsung Galaxy phones run Android, while Palm Centro runs Palm OS 5.4.9.
Palm OS SDK is difficult to find on the modern Web, especially as there are no official resources from which it can be downloaded. Palm failed long time ago.
Also, Palm OS wasn't even built with security on mind (lack of memory protection), when nobody even knew that smartphones (cell phone/PDA hybrids) will ever be invented, so it isn't suitable for large amounts of bitcoins, although it would be great to transfer Bitcoins on it at all.
For example, it's trivial to make a Palm OS trojan that will extract the private keys from a database (encrypted?) and the password and send them over the Internet to cyber-criminals. I doubt it, especially as almost no one uses Palm OS anymore, however, it's better to be safe than sorry.
Palm OS? haven't heard that in years. The OS discontinued on year when Bitcoin network came into existence, so i doubt there are any people who'd make Bitcoin wallet on Palm OS.
The only possibility is using web-wallet if the browser support modern JavaScript.
Sure, but isn't it possible to create a web-wallet which requires nothing more than Blazer's JavaScript support? Of course I know that it will be insecure!
