The concern about leaking liquid alloy is a valid one; gallium will diffuse into many other metals, structurally weakening them. Search around for some interesting videos of gallium being used to turn an aluminum soda can into the consistency of a wet paper towel! It's possible that it has a higher affinity for the co-alloy, making this a non-issue, but I haven't a clue if that's the case.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.