Use IzeaRanks.com instead of Google's PageRank Now
Here they would check out the backlinks for the blog on that particular day [probably given less weightage], traffic numbers collected everyday and rank your blog in their system.
How they collect the traffic numbers?
You would need to install a piece of javascript code from Izearanks.com and that would start giving them traffic data about your blog and will help to rank your blog better in the system.
They also publish the list of Top 100 blogs each week, and they give away $1000 prize money for the top blog each week. Wow, that's cool! I wish I would reach to that levels one day and make $1000 in a week with them.
Forget about the prize for now, but signing up with them to add your blog and display the izearank in your blog would give a different boost to your rank and apparently convince your advertisers that you are a good quality blog.