Thanks! I'm the OP and also a bit surprised by the quite negative reactions to the post. Particularly because user reviews are part of pretty much every website which promotes any type of product on a larger scale (Amazon, CNET, IMDB to name a few). The more contributors, the more trustworthy the site and the reviews. Can it be that few of the /. crowd actually every post a review on any of these sites?
What annoys me with these websites, though, is that as soon as you start contributing to most of them, you lose ownership of the content you create, while adding value for the website in question. Goodreads is an exception, and thrives on a huge community of individuals who clearly are far removed from the commenters to this post (because, as, it appears, /. doesn't "give a fuck" and thinks these people are all rather "vain").
An open product review website would solve this.