A little while ago at 11 PM, a call came in from my aunt in North Carolina informing us that my grandpa (Mom's dad) passed away this evening. According to dad the nurses found him in his chair when they came in to get him ready for bed, so at least he passed away quietly.
He's been in ill health and living in an assisted living facility for some years now, so we've been expecting this to happen eventually. I wasn't all that close to him so I'm not broken up about it, although I am glad he didn't have a heart attack or anything that made him suffer at the end.