Typeahead GO box!
Pretty good
One quick suggestion: hitting enter (or clicking go) after typing in some characters should always default to that alias (especially if such an alias exists), not something longer. For example, you should just be able to type 'ami' and hit enter; at the moment doing this defaults to 'amitie' (at least on my browser). This is the behaviour people expect from Google.
I'll see if I can tweak that experience. I get it too.
My first goal was to load the blockchain into a database, keep it updated, then see what trouble i could cause.