Unless you're stuck using . NET 2.0, you shouldn't do either one. .
Asmx files are now considered by Microsoft to be a "legacy technology". All new web service development should use WCF. See http://stackoverflow.com/tags/wcf/info .
You are rushing for a solution. It not that simple, read articles returned by a search term such as "asp.net web service" or "wcf web services.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.