Sorry for the relative silence of late, but the explanation is simple. Last week, I was finishing up one job and the resulting mountains of work with which I didn't want to leave them; this week, I have started a new one with a new company, and am working through the whole new-kid-where's-the-bathrooms stuff.
Short reasons for moving: more responsibility, more growth potential, managing a team instead of doing everything myself, and a much more transit-friendly commute (even if I never drive to work again, it will be too soon).
Plus the fact that I can wear my kilts to work. :)