Checked this out and have a few thoughts. I wasn't expecting a full browser interface (specifically, tabs, etc). A site-specific browser, to me, is not a browser replacement, but rather an alternative application for a specific site. The moment you add more than one site to a SSB,it defeats the "site-specific" aspect. The reason I used Fluid or Prism (other SSBs) is that I get separation of browser instances for each of my webapps. With Raven, this seems to get "lost". I do like what they are calling the smartbar, as it adds quick shortcuts to various areas of the webapps that are running. This is nice, but again, this detracts from the SSB aspect. At least you can hide it, unlike other apps using this UI concept. The other thing that I feel is missing, or at least I could not find easily, is a way to install userscripts and userstyles. For me to switch to a different SSB platform, I would need to be able to bring over my customizations. Other than this, the app UI is nice, the icon is nice, the name is nice, and the domain and website are nice. Look forward to seeing where this app ends up in the long run.