As product manager a equinux, my favourite part of any product launch is the final stretch just before you release a product to the general public.
At Kickstarter, entrepreneurs can pitch product idea to potential customers before it has even been produced. As a backer, you usually get early access to the product and get to watch a product being launched to a wider audience.
A word of warning: this isn’t the site for instant gratification, as it can often take several months before you have the finished product in your hands. But there are some really great ideas to be found and usually product developers are very forthcoming with regular updates.