http://www.ziphone.org/search?updated-max=2008-02-07T18:50:00+01:00&max-results=3
And one page newer explains it.
From what I understand because its been a while, he was in the Dev Team but then there was some arguement, and it got him kicked out. Then he released Jerry Sim, check iphone-dev.org for more info on that, and then it started pretty much a war. He made a ton of enemies because he was very bitter for a LONG time to a lot of people. Most people took the Dev Team's side because together, they had done a ton for the iPhone community while he hadnt done anything till then. He had the upperhand with ZiPhone, but now the Dev Team has retaken that and probably will never lose it with Pwnage...