Nate True from cre.ations.net unveiled a HOWTO running remote desktop client on the Apple iPhone. The howto described by him based on his experiment. According to him, the idea behind the creation are “to allow users accessing and using PC from the iPhone, thank to the safari browser”. Nate True developed the software based on TightVNC and only compatible with Windows, at least for now. The steps is simple, you can follow carefully the instruction here.