Nora Ephron is gone -- and I can't believe it. Whenever I was around her through the years the air crackled with energy and ideas and one-liners -- and a sense of celebration. That's what makes today's news so hard to take in. Nora was an integral part of the HuffPost family -- an investor, a supporter, and a constant sounding board months before we launched. Since then, she's been a contributing editor who more than lived up to her name -- regularly offering up notes, suggestions, and terrific ideas (our very popular Divorce section was one of them). Professionally, her legacy will be that of an exceptionally gifted and versatile artist who could do it all, and do it all incredibly well. Personally, she'll be cherished as a wife and mother, and a devoted, giving, treasured -- and irreplaceable -- friend. Indeed, she was as talented at friendship as she was at everything else she tried.