About WebService Bridge

I'm a beginner of atlas.These days I'm learning WebService mashup in atlas. I don't know how to begin.

Is there some material of mashup in dot net for beginners? Thanks

I found this great for learning Ajaxhttp://ajax.asp.net/docs/
But I can't find document about mashup in the docs

http://ajaxian.com/archives/secure-ajax-mashups-with-the-tag

do a search on Google for mashups ajax microsoft...

Hopefully that helps