depends on when you got those links above, you might not have gottent the right PR reflection on this update given that your last PR was 0. i would say wait till next update to see the proper reflection of PR for these backlinks. and keep building btw...
How big is your site? Bigger site (make sure the content is unique) with proper internal linking might help to increase PR as well.
chill out... it's only PR. there are many more important facets to running a decent website. good content and a few visitors always helps. dont waste your time worrying about PR