Thoughts on Hashable 

I received an invitation to on Friday and have now signed up, installed the app on my iPod Touch and sent out invitations to a couple of people. So how do I envisage using it?    Using relevant content hashtags (e.g. #a11y) to allow the service to be aware of shared professional interests and doing likewise for social interests.  And perhaps also using a tag for the first time I make contact with a new person.  Will be interesting to see if this provides any significant benefits.