...or would google still see these as the same domain?

Sure it see them as the same domain.Is the IP address it recognize.

But I don`t think google give less credit for linkexchange... the problem is that you are "giving" some of your page rank too... but if you recive the page rank on your home page and you give it from a subdomain... it will be good for your site...

I don't think that Google counts links coming from a subdomain.

>>>I don't think that Google counts links coming from a subdomain.

Tell that to About.com.

OK!OK! I seen.

But makes it a sense?

I would mean: to gain PR from your subdomains they must have a good PR,right?
So they have to be linked to other good PR external pages (external is intended as coming from other web sites),right?
Then, why use subdomains?
Link directly external pages to your domain and away you go.

Again "But I don`t think google give less credit for linkexchange... the problem is that you are "giving" some of your page rank too... but if you recive the page rank on your home page and you give it from a subdomain... it will be good for your site... " If I am correct this is not an issue...

the post should read "www.example.com located on subdomain.example.com" btw.

I don't think that Google counts links coming from a subdomain.

Guess that eliminates Yahoo! Directory, Google Directory and anyone using Blogger. :-)