If you are concerned, we advise that you notify your online poker room of the software so they can review it and determine if this application should require a review of the site's Terms of Service. http://www.pokerstars.com/poker/room/prohibited/
Keep in mind that the functionality of the software you described is no different than what players can theoretically already do using commonly available chat tools such as AIM, Skype, or even basic text messages. This has been a challenge that the online poker industry as faced since it's inception, collusion can occur but typically colluders leave a long trail of evidence that can be detected and stopped by a competent online poker room which should greatly reduce your concerns as long as you are playing on the market leaders. Live tournaments are different, in a live event you are permitted to use your phone at the table, but you must walk away from the table to talk and only type into your phone while you do not have cards in your hand. The players work as part of the policing force to assure compliance, but like online poker eventually collusion is usually detected due to the amount of evidence left behind. Colluders tend to take short cuts to gain profit, qualified tournament staff typically know what to look for to detect collusion when there is a questionable action.