Let's not forget... Twitter may have made the hashbang infamous, but it was originally championed by Google [1].
[1]: http://googlewebmastercentral.blogspot.com/2009/10/proposal-...
[1]: http://googlewebmastercentral.blogspot.com/2009/10/proposal-...
Google's examples show the hash bang after the query. Twitter put the query after the hash bang.