Currently Being ModeratedSep 26, 2011 4:00 PM (in response to abdulhakeem)
The Contacts App has an option to call a contact using FaceTime. However I do not know of any way to know if someone has a facetime account. Further, you can not tell if your friend has the FaceTime program running without calling them. Skype is better in both respects. In additon, FaceTime only works over WiFi.
I suggest you let Apple know what you need by leaving feedback at <iPad Feedback>.