HR isn't going to read your blog, and HR is, sadly, the gateway to (just a guess here) 90% of job opportunities. If you have an 'in' at the company, you can bypass HR's initial gating, and your plan will work, otherwise it's unlikely.
The point isn't to get HR to read your blog; the point is to fill up that timeslot on your resume so that automated screening systems don't reject you for having a gap. If you'd worked at a regular corporation, it's virtually certain that HR wouldn't be able to see your work product either.
