Apple iPhone development - Does Security nullify an Open environment?

What actually defines open? It seems there's a mixed bag or responses that all seem to have some validity... for example, in a message regarding the recent announcement of an SDK and development environment for the iPhone, Steve Jobbs had this to say... "Some companies are already taking action. Nokia, for example, is not allowing any applications to be loaded onto some of their newest phones unless they have a digital signature that can be traced back to a known developer. While this makes such a phone less than “totally open,” we believe it is a step in the right direction." So do I understand that we'll likely be seeing an "iPhone signed" requirement for the application developers... if so I wonder how much it will cost to get your apps signed?

What makes Nokia and the symbian OS the global leader is the fact that there exists a robust, open development environment in the S60 platform. Granted, Nokia won't allow applications to run on S60 unless they are signed but does this make things any less open... I'll take the security any day. Related links - http://www.apple.com/hotnews/ / http://www.s60.com & see also https://www.symbiansigned.com