We can learn from Hilary Clinton's launch of her campaign for the White House yesterday. Interestingly she did not ask the voters for their approval but launched her "conversation" with the American people. This was definately going for a spectacular open rather than a close.
When looking to launch a new product or company we would recommend you launch the conversation with your customers first. Don't be too quick to close and like Hilary invest in the open. If she keeps this up I predict great things for her and maybe we will have the first female President of the US and I guess that means Bill will be her 'First Man'