DDOS attack last Friday

Dyn themselves are a pretty big commercial DNS provider, so quite a few sites experienced issues. TTLs and distributed DNS though tend to mitigate this issue, the US east coast seems to have experienced the most issues; the attack was probably concentrated on Dyn's infrastructure in this region.

Reports suggesting that this was carried out using compromised IoT devices. This is definitely a major concern that needs to be thought about. The volume of Internet-capable consumer devices based on just Android is growing exponentially - in most cases the consumer has no need nor ability to interact with the underlying OS, so devices will remain unpatched and vulnerable through their entire lifecycle.