http://buyhappy.co/
The stack is Clojure/ClojureScript. The client connects to the server over a websocket (using Sente). Searches are passed to the server and results are streamed back, which are stored up in a big hashmap. Om rerenders that as things come in.
The server searches Amazon Products API and our own local elasticsearch of products. Matches products up across retailers, and sends it to the client. There's some live scraping of product pages to get up-to-the-minute price and status checks.
It's my first major Om and Websocket application and I'm pretty happy with it. I'm open for opinions on the service and implementation.
Thanks!
http://buyhappy.co/