The only time it is totally legitimate to tweet more than once a day. Great use of twitter by @killthenoise. This is a great example of how the positive effects of timing and real time in social media becomes visible on twitter. @charliesheen is another good example of this.
What else is great about this tweet is how he uses the success of instagram to tap into the conversation. Everyone are over fed with instagram by now, and by playing with peoples emotions on the subject he manages to surprise and gain credibility.
Think about that. You don’t have to tweet everyday to be successful and a bit of spamming once in a while is ok if you choose when. Spend a little bit more time planning what to tweet before you start stressing out about having to tweet every day and maybe you will find a break through on twitter!