The guys behind FaceTime Hacktivator have managed to get FaceTime up and running on an iPhone 3GS — without video i.e; they have to yet figure out a way to use to use the iPhone 3GS camera…Hoping that it will soon hit to cydia…
Though without front-facing camera, It will be quite awkward to use, but still this will be useful tweak and especially for those 3GS users who never wanted to upgrade but at the same time wished for facetime.
Here is the demo video: