eMail Future

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Does e-mail have a future? Is it dead? Are texting, Facebook, instant messaging and Twitter pushing it aside? What will be the impact of Wave, the new Google communication and collaboration tool that is out now in limited release? I have requested an invitation to try it out, but have heard nothing and await to hear back on a second request.
E-mail as we know it isn’t dead and will almost certainly co-exist with the other mediums for some time. In some respects the way we communicate are simply new fast-growing forms of e-mail so one could contend the differences are simply semantical. But that’s a weak argument. The very public Facebook Wall certainly isn’t e-mail nor is texting which in its current incarnation is instant messaging over cell phones.