Sascha was associated with Marvin Minsky and Pattie Maes, and (like Minsky's protege, Pushpinder "Push" Singh), was one of the few people who'd wander the halls of the Lab, at all hours, striking up impromptu intellectual conversations (new AI methods, transhumanism, philosophy, economics, etc.) with random students. (Basically, much of what I imagined MIT would be like, they were it.)
Tragically, Sascha died way too soon. I don't know how much this impacted the future of Transhumanist thought, but I'm sure he'd have done more to advancing that and whatever he saw that thinking should be evolving into.