We want to add a comments/reviews feature to our website's plugin gallery, so users can not only vote up or down a particular plugin, but also leave an optional short comment about what they liked or didn't like about it.

I'm looking for inspiration, ideally a good implementation elsewhere on the web which isn't annoying to end users, isn't impossibly complex to develop, and which enables users to see both good and bad comments side-by-side, like this:

Like: 57 votes                           Dislike: 8 votes
---------------------------------        --------------------------------
"great plugin, saved me hours..."        "hard to install"

"works well on MacOS and Ubuntu"         "Broken on Windows Vista with 
                                             UAC enabled"
"integrates well with version 3.2"      
                                         More...
More...                               

Anyone know a site which does something like this?