Reviewing old books is perhaps not that bad an idea. Many people haven't read The Windup Girl, or even The Moon is a Harsh Mistress. Especially with RAH, with no new books coming out, there are no big advertising pushes for his works, even though they're republished periodically. Moon isn't even available in Kindle format for some bizarre reason. (I'm about to scan one of my copies so I can have it on my Kindle. If it's ever available in Kindle format, I'll buy it.)
I was at a sci-fi con a couple of years ago, and the _only_ author who had a discussion panel dedicated to their works - was Robert Heinlein. Sadly, the average age of the people there was quite high. I can't help but wonder if some new reviews on a site like Slashdot might encourage the young'uns to pick up some RAH and give it a go. Maybe some even older stuff like E.E. Doc Smith.