Carl (of .NET rocks fame) is at it again, (sorry I lied no Rory this time) thanks allot for the sockets video(s). Make sure you check them out. Also, make sure you hit F11 in IE for maximum viewing area.
This is a multi-part flash video in which Carl Franklin shows you exactly how to build an asynchronous sockets terminal program in VB.NET. The video shows in the browser at 1024x768, so you really have to have a higher resolution in order to view it effectively.