it used to be different isnt it?
http://www.google.com/swr?q=Google&hl=en&lr=&swrnum=719000000

You use the word in the parameter "q" (Google) and your query as query!

What exactly does Search Within Results do, exactly? I've always argued my point with my dad that it's no different to just refining your query in the search box... it's just there for usability reasons, rather than a different function.

Am I right?

i think youre right Joe..
lol.. :P