I'll just start following them on Twitter then. I've recently started working somewhere new where we use SendGrid, and this is the first outage I've been aware of.
I did the same thing. Followed them on twitter just to be aware of the outage status without having to go look for it.
Since the service is timing out, I think we'd all be best served in this case by having robust internal monitoring.
They tend not to post about interruptions on Twitter. In a lot of ways, they fail as an API-type service provider: