I'm on the MSDN Flash Latinoamérica Newsletter (Feb/2006)
Well, not really... but at least my recent article on network programming is on it (Programación de Redes con .NET 2.0 - Parte I). Check it out:
This is a great newsletter with tons of information for Microsoft developers, I highly recommend it. You can subscribe from the following link:
http://www.microsoft.com/spanish/msdn/latam/msdnflash/default.asp