Voting UI for showing like/dislike community comments side-by-side

Programmer Question

We want to add a comments/reviews feature to our website's plugin gallery, so users can vote up/down a particular plugin and 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 particularly well? I don't need source code (since implementation will be simple), just looking for UI inspiration and best practices.

I'll accept the answer which refers me to the site which, in my biased opinion, is the best mix of usable (for end users reading comments) and addictive (for active users leaving comments).

Find the answer here