Imguana is a multi-protocol instant messenging client (similar to Gaim) for Windows. In the future, a Mac and/or Linux version may be released.
Put very simply, GaimDotNet is basically a project to take Gaim, and turn the client into a Microsoft.Net windows application based on already existing connection protocols.
The project already exists and it is now working and being gradually implemented. Here is its address: http://www.saber-digital.net ou http://www.biblioteca.pro.br Check it out!