I know, I'm a marketer, and I like visual things, which is why I always wondered why Twitter was so spartan with its notification emails.  Below are a couple screen-shots of the types of email I've been getting from Twitter since 10am this morning.  They used to be so transactional, bussiness-like, and dreadfully boring.  Now, Twitter has elevated its brand massively through a wildly effective push-medium like email.  The below emails really pop of the page instead of being completely forgettable.  This is all the more important considering folks like me almost never go to twitter.com - instead, I always use Tweetdeck or Twitterberry, therefore I almost never interact with the Twitter brand in an environment that Twitter controls.  So, long story short, I'm in love with their decision to go with HTML email notifications. Such a tiny little thing makes a HUGE difference to many of us.  Take a peek: