Can’t stay away from your Linux(Unix) computer. There are many applications for iPhone and java phone which will let you get in to the Linux computer. You can even transfer files between your phone and Unix computer. If you are a geek for Command Line Interface this might be a fillip for you.
MidpSSH is an SSH and Telnet client for MIDP 1.0 / 2.0 (J2ME) devices such as Java(tm)-capable cellphones and other PDAs/mobile devices. Now you don’t need to carry a laptop with internet connection. Documentation on MidpSSH is also available. Do not use it for the regular purpose, however in case of a critical situation it can act as a life saver.