Ask HN: Open review systems?

I like to keep track of restaurants, movies and whiskeys I like, but I'd like to do it a) on my own terms and b) in a way that is potentially semantically helpful to others, particularly friends and fans. Yet I haven't found any decentralized Yelp!'s or FourSquares, nor any sort of standard for posting reviews, for example, on my site. Any advice? Should I just buckle under and give/trust my data to traditional review sites? Should I just post reviews on my site, and to hell with the semantic web? Any thoughts are welcome.