The Foscam Wireless Indoor IP Camera works on the Iphone using the standard Safari Browswer with no additional apps necessary. However, people have started to develop Iphone apps for the Foscam which add greater functionality. For example, check out the Foscam IPhone Control App:
iPhone apps at AppStoreHQ
I haven’t really tried the above app, but I have heard it works. If any of you have used it I would like to know what you think. I do not get a commission if you purchase it, in case you were wondering.