hey,
chris from io here - resolvehax is my blog.
not sure if how the getconsole app works but you'll need a jailbroken phone to use my cable, due to the requirement for an apple approved hardware compatibility chip, which it obviously doesn't have. if you are jailbroken, download and install terminal and minicom through cydia. if you can use minicom (the serial port is /dev/tty.iap) then the cable works hardware wise. the main problem people have had (myself included) is getting the pinouts right. the manual for the RS232/TTL converter chip should give a better idea of how to do that. check it yourself with a multimeter, when you type there should be a voltage spike on the tx line.
cheers.