E-mail isn’t typically known for generating the kind of rabid adoption that you see with, say, smartphones . Microsoft, then, may have some room to brag when Outlook.com produces similar numbers. Tucked in amidst news of the finished SkyDrive app remake is word that the new webmail service already has 10 million members in its first two weeks of action. That’s fast when you put it in the context of Gmail’s slow but steady growth, although the boasting doesn’t tell the whole story. As many with Hotmail spam addresses can attest, there’s a difference between signing up and becoming an active user.