Harry - 8:29 pm on May 2, 2012 (gmt 0)
Twitter has solid positives in store. it has the hold on the universal ID that has been tried before and never adopted. No one else has something as ubiquitous as Twitter's @moniker. I can put that on a business card and people will know where to find me and reach me even without having access to my phone number or email. It's actually easier to remember and use. neither Facebook nor Google+ have anything like that. As for yahoo and MSN, their user handled are tied to specific products and not portable to other apps and apis easily.
That's just one of the value proposition that Twitter offers - as a unique selling point.