>If you're going to use that client instead of something like Trillian or Miranda - you might want to take a look at Messenger Plus! - it's pretty slick - adds some features & gets rid of that stupid banner ad too...and it's free.
>http://www.msgpluslive.net/

I believe there is something in regards to .NET that avoids advertisement on my PC. However, I do have the same version on my laptop.