Eok is developing VoIP for iPod touch
By using the SvSIP software for the Nintendo DS provided by Samuel Vinson, a developer identified as “Eok” has created a semi-working VoIP client for the iPod touch. Although the Touch does not have a built in microphone, a small dock connector mic was developed by Touchmods’ Marian and has been successfully tested with the SvSIP software. Information on the project is sparse so far, with only a casual mention, and a few lines from the log files.
source: ipodnn.com