It's hard not to return from the RSA Conference and not think of that whole "firehose of information" metaphor tech folks love to trot out. Because that's what the RSA Conference quite literally is: a firehose of information. Whether you get there early to take advantage of pre-conference tutorials, prefer to start things off with the annual Innovation Sandbox Contest, or arrive just in time to catch the opening keynotes, from those first moments until you return home at the end of the week, it's one new concept, strategy or perspective after another. Each RSA Conference brings its own…