Site has unique functionality: combined web 2.0 social bookmarking site with web proxy service (proxy with browse history). Visitors may use proxy for some time "for free" but then asked to register - therefore site can provide them bookmarks and browse history interface - there bookmarks has tree-like structure with wysiwyg drag-and-drop editor. Site is pretty unique - so I need your (positive ) reviews to confirm I didn't spend last month programming useless crap =)