According to a trustable source from Mac4Ever, Apple is preparing to announce FaceTime for both Mac and Windows. The Mac version will be integrated into iChat, also Apple is going to release a new software to bring FaceTime for Windows. It would be interesting if this is really true.
So, in brief, If you have an iPhone 4 or iPod touch 4G, you are going to make calls between iOS devices and a computer, imagine it! This should be happen very soon, as usual we will keep you informed, stay tuned.