Co-blogger Norm Pattis has grown his office substantially - adding new lawyers and new locations. In light of this, he won't have the time to continue blogging. (There really isn't anything juicy to this - no "break-up" or other attendant drama.)
I've been burned out from blogging for a while now, so I'm not sure if I will continue blogging, either. It's been three-and-a-half years, and I feel like I've talked about everything interesting to talk about. So we'll see what happens.