A free App for EchoLink is available for iPhone and Ipod Touch (gen. 2 or 3). It worked great with my iPod Touch. Much easier and handy than with a PC. Info is here. Below is a screenshot showing my connection to the VHF repeater SK0CT-R.
Yesterday, with my iPod Touch, I had my first EchoLink contact with Jonas SM5PHU/mobile in Kista via the SK0CT-R VHF repeater in Kista/Stockholm.