If you've been waiting for an #intro to Hashable —the only way up until now that you could get into the semi-private business networking service that keeps tracks of your connections through Twitter and email—you can now invite yourself by downloading Hashable's iPhone app ( iTunes link) . It just went live on iTunes this weekend. Hashable makes it super-easy to introduce two people via Twitter or email, or keep track of people you #justmet or had #lunch with or showed a #demo to. Up until now, you had to remember to Tweet out the correct hashtag and the Twitter handle of the person you connected with so that Hashable could record it. That was fine for early adopters, but once you have the iPhone app, there is no going back to the Twitter and email hacks.