MorphVOX Pro voice changing software can be used with all online games including World of Warcraft, EVE Online, Second Life, Lord of the Rings Online, Everquest, Counter-Strike, Battlefield 2 and many more.
It also integrates with VoIP and Instant Messaging programs such as Skype, Ventrilo, TeamSpeak, Yahoo Messenger, MSN Messenger, AIM, XFire, GoogleTalk, Roger Wilco and more.
In the studio, MorphVOX Pro integrates with multimedia applications such as Sound Forge, Vegas, ACID, Audacity, IClone and much more.
I think this product truly lives up to it's potential, seeing as you can change your voice in most household programs, including msn and skype.
I have used this to have a laugh with my mates, and is great for prank calls on skype.
Really Good Software.