Pr 0 means that Google recognizes your site and assigned it a pr 0, pr N/A means that it hasn't assigned a pr to your site yet
N/A and Page rank 0 is not same. Page rank 0 from N/A means you are near to get Page rank 1 or more. If your site is new with page rank 0 then it is great notification. Start building links for your site. You can surely increse your page rank in next update.
It means that your site was rated by google its a step in the right direction as somebody allready said ! Keep on posting and build BLs so you get good PR and lots of cash from Adsense
PR 0 is greater than n/a. if you have got PR0 means you are going in right direction. Google has liked your website/blog. keep on working. good luck..
Some of the PR factors are given below: 1) Traffic, 2) Quality Content, 3) Backlinks, 4) Inner Linking.
Since you said you haven't link build yet for your site but it has PR 0 already, then your site is already index by Google with no quality or any back links from other websites yet.
PR0 > PR n/a PR0 is given out any time of the year to show Google has at least seen and is aware of your site/page. PR n/a means it's as good as non-existent to Google. As mentioned eariler yes, PR0 is a step in the right direction, when PR is updated you may or may not have a rank depending on how you continue to build links.