Expanded search results on Google

if you enter key word :answers, you get answers.com and plus more links from this site..(i've seen it with so many websites) .. more or less commercial so i guess it's more trick than something you need to pay to have displayed)....

so i am wondering, is there any trick like adding the page with links that can be read by Google spiders only or something...???!

thanks

this one it happened to be .jsf file..but i've seen .html too and others

Google key words: apple, mtv and so on...

#442383

can't remember where I read it, but it was something official: there's nothing you can do to get those link, they are added automatically. Only prerequisite, you are a something big and important

#442388

i'm almost sure that even those not that important sites have it..i will try to find some..that's why i even start thinking about it... i would think myself that only big important sites have it but i have seen some in the past (or i was drunk

#442389