I agreed with The Unpredictable. It may not be important as emoticons is not a necessity (I think) but people tend to do comparison especially when there's other competitor in the market. People are usually willing to change if the changes does not have much difference from what they used previously.
Don't get me wrong, I really find ooVoo user friendly and can foresee it beating its competitors within 1-2 years but ooVoo should consider corporate users as well. It might be more approachable as definitely more profit as company won't mind spending (not too much) on such program.
KEEP UP THE GOOD WORK! KUDOS!