SKYPE VS GOOGLE TALK & ICHAT

Conducting a conference between two or more participants at different sites by using computer networks to transmit audio and video data. For example, a point-to-point (two-person) video conferencing system works much like a video telephone. Each participant has a video camera, microphone, and speakers mounted on his or her computer. As the two participants speak to one another, their voices are carried over the network and delivered to the other's speakers, and whatever images appear in front of the video camera appear in a window on the other participant's monitor.

Some possible servers you can use to videoconference are:

Google Talk   

Comes in two flavors: a widget to use from a Google and a 1.5MB download. It integrates directly with a user’s Google Personalized Homepage, and the Google Talk application automatically loads your contacts from a Gmail account, speeding setup time. Unfortunately, the Google Talk Client currently works only with Windows and BlackBerry devices, although Google promises Linux and Mac OS X versions in the future. Pro: Interfaces available in a dozen languages, including British English. Con: Google Talk does not connect with landline phones or mobiles.

iChat  

Has many of the same features as Skype, excellent voice quality and ready integration with iSight video cameras. It is also less of a bandwidth hog than Skype. The current version, iChat AV for Mac OS X 10.4, is the next best thing to being at a conference table with your co-workers, enabling razor-sharp videoconferencing with three others or audioconferencing with nine. In

and finally, the most used one: Skype

 

This service allows users to communicate with peers by voice using a microphone, video by using a webcam, and instant messaging over the Internet. Phone calls may be placed to recipients on the traditional telephone networks. Calls to other users within the Skype service are free of charge, while calls to landline telephones and mobile phones are charged via a debit-based user account system. Skype has also become popular for its additional features, including file transfer, and videoconferencing.