Neat idea! One quibble: since the essence is specifying a domain-name in a new way, it'd be good if the 'escaping' convention didnt' clobber/assume a single protocol/scheme. As it stands, it's not clear how this would be used for other schemes, even 'https'.

Perhaps allow 'scheme#' (where naked '#' implies 'http#'), or move the convention entirely to the domain-name area rather than scheme area. ('#food in chicago' -> 'http://#food in chicago' -> 'http://f02970848a63988965aa40cd368ffcf9046209ca.com')