According to yahoo site explorer you have more than 700 backlinks. What kind of backlinks are you talking about? You can write articles on ezine to get some high PR links, I see you already have links from hubs.
I think you are already on the right path. Just keep doing what you are currently doing. comment on dofollow blogs a lot more often
find dofollow blog with high page rank site to post comment then you will get backlinks to your site. and dont forget use socailbookmark as well. this will help your blog rank high in google