why ?

Skype-like instant messaging and VOIP for the iPhone:

Fring up your iPhone with this pre-release, development version and discover the freedom of taking all of your Fring, Skype, MSN, Google Talk, ICQ, Twitter, Yahoo! and AIM buddies mobile on your iPhone, allowing you to make free calls over Wi-Fi and enjoy rich, IM-style chat with them using internet connection.

Interesting to see continued innovation in the jailbreak space. I’ll bet there are a bunch of competing projects underway for the official SDK. As far as I can tell, Fring doesn’t work over EDGE. EDGE seems so slow, and has such high latency, that perhaps usable VOIP-over-EDGE just isn’t feasible. (Via Andy Baio.)