The one-click / ease of share is an important and interesting focal point. A bookmarklet - ~"submit to howl from any page with a single click" - seems a logical

The one-click / ease of share is an important and interesting focal point. A bookmarklet - ~"submit to howl from any page with a single click" - seems a logical step for you there. the ability for me to provide context for my shared links - through profile info, general insterest statements, etc - might make sense later. good luck with it