hi google update rank twice in a year.i am also worried about getting page rank. but after studying a little bit i learn to concentrate on more contents, backlinks and then traffic to get page rank quickly from 0 page rank.
If you want to make it to a high PR on Google, all you need do is make sure your content is unique and updated regularly with informative posts, generate traffic and quality backlinks through social bookmarking, forum posting, blog commenting, social networking and press release.
Just join some well known forums and do blogs comment more in a day you well soon see the result and improving your PR also.
thx all .. will start with forum posting.. does forums have to be do-follow or no-follow will also help.
Update your blog regularly by publishing quality content and then syndication is very important, do a lot of link building, use as well social networking sites and submit your blogs to different blog directories.
To get a pr it is important to get pr backlinks if you have 10 pr2 backlinks, you should get a pr 1 or 2, providing you have good content too. You often find that squidoo lenses have good a pr. Comment on lenses that relate to your blog.
Usually Google update PR after 3 months, but there is no hard and fast rule, so keep working in right direction,soon your site PR will be increased.