Up to now, the only way to do that is to jailbreak, or hack, your iPhone. One of the programs you can download is Qik. One of my friends used it and I like it for what it does. It's good enough until Apple decides to implement it.
Recently the founder of Digg, Kevin Rose, posted on his blog a non-jailbroken version of the Qik program and he claims that it will be on the App Store soon. However, Qik posted a response on the company blog which says:
- Qikkers and Qik fans out there - I want to clarify the questions that are being raised about Qik coming to iPhone App Store. We are looking into this, but at present are not sure when and how this will happen.
Personally, I hope Qik will end up in the App Store. It would be advantageous to Apple to buy some time while they work on other more pressing software matters like push notifications and cut and paste. Meanwhile, you can watch the Kevin Rose video and dream...