routes.php

Event::listen('404', function()
{
    $username = URI::segment(1);

    $user = User::where_username($username)
        ->where_type('account')
        ->first();

    if ($user != null) {
        if ($user->username != '') {
            return Controller::call('website@view', array($user->id));
        }
    }

    return Response::error('404');
});