We have been developing SupportBee for the last 7 months with feedback from some HNers. We now have a working product used by a few of our beta customers and have put up a video demo of our product on the site. We would love to hear the feedback from the HN community.
If you are curious, this is a single page Backbone.js app backed by a Rails' API. More tech details are at http://devblog.supportbee.com