#2 has a lot of promise, based on the gap I experienced first hand working for a very large software company. They have supposedly a complex infrastructure to g

#2 has a lot of promise, based on the gap I experienced first hand working for a very large software company. They have supposedly a complex infrastructure to get beta users but had extreme difficulty in extending it to thousands of users and consolidating their input. I would consider #5 as the weakest idea in the bunch. There are an enormous number of existing sites that offer the same premise. In fact, one could even use Facebook in the same way when the family restricts the friends to other family members.