Best resources for Symbian are of course at forum.nokia.com. “Series 60 2nd Edition SDK for Symbian OS, Supporting Feature Pack 2″ is a nice SDK containing an emulator with debugging and many other features (remote debugging not sure though). As for data transfering between PC and device, SyncML would be an option but I would recommend using OBEX over TCP/IP and also direct access of the embedded file system using the shell extension provided by Nokia (Phone Explorer) (this may need some hacks I assume).