Just two weeks ago installed skype on my system, now gone fond of skype. It is very easy to install(of course pyrated) lol..very good voice clarity and video quality (depends on your net speed).
Even if yor speed goes down it indicates about the same
One must definitely try it to increase his/her count of must have things...of course in terms of computers and gazzete only , mobile version of skype is also there on ovi store with same capabilities.