if you jsut started you blog. i think you are better off worrying about your content than your pagerank. get some good content and some backlinks and the pagerank will follow.
i have a few sites that run the unique article plugin. i use them for adsense revenue. i get a good amount of traffic and make a little. i dont think any of the articles or links on any of my sites are doing anything for their writers. almost all the articles are PR 0 or not available. from my side of it i would never pay to have my articles on Unique article wizard.