My site has reached PR4 now from PR6.
I find some of this stuff surprising. My 18 days old site, went from PR0 to PR1. I have done nothing with it. I only put it up for sale...lol, and it got sold for $20. It had 10 unique articles, could of made more money with it
there's a similar thread already created http://www.netbuilders.org/promoting...ate-13379.html
I got a great new years gift from Google's PR!
I just bought Blogger Den / It's like Digg, but for bloggers! about 2 months ago at a PR0 domain, and I built it all the way up to PR4 in a matter of 2 months. I'm very proud of my work, I have to say!
Avoid Public Links
Even though that is about selling links, I still don't prefer to display my link in public and talk about its pagerank and what not.
Sig links should be fine