hi,
the 7650 has an infra red port. so u can install the mobile software from nokia.com & transfer the java applications through an infra-red port from a computer.
i hav tried that it & it works great...no cables...no hassels.
By the way Nokia 7650 supports BlueTooth, so bluetooth is an alternative to communicate.
I advice you not to use cable (except original one), try IR or Bluetooth.