I love the concept and am certain that's the way of the future. Heck, I'm half tempted to apply for a developer position. I worry about the long term viability of it as a business model however. When the time is right, I'm pretty sure that the big boy structural software developers will flip the switch and start offering their wares as online subscription services as well.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.