This is a tragic shock. I met Alberto at the first meeting for Dorkbot DC 16 years ago, and we stayed in touch over the years about different projects and shows, most recently the amplifiers on his "Appliance" piece. As Gareth wrote, he was always helpful, generous, grateful, and encouraging, and seemed to know everyone in the DC art world and at the intersection of art and technology - a true "connector".
Please pass on information about any memorials or events - I'd be happy to help with some kind of Dorkbot-style meetup or symposium in his honor.
--Tim