Facetime is an apple only product, you can't facetime without a mac/ipod touch/iphone, and it would only work via wifi. What you can do is video chat with them with an app like Tango or Fring, which have iphone counterparts. For chats to a computer, Yahoo Messenger is the only way currently that I'm aware of. For other android users, other apps like oovoo and qik are also available. Have you tried all of these?