I already asked a few beginner questions, found some demos, altered them and realize that I might have a lot more questions ...
Does anyone know of a book which covers Indy programming in Delphi (preferably D7) ?
Googling for "indy book delphi" returns "Indy in Depth" http://www.atozed.com/indy/book/index.nl.aspx as the first result. The page mentions it hasn't been updated recently, but as you are using Delphi 7 it will probably still be pertinent to you.