Derek,
Jeff posted the link to my event calendar page on tiltforums a few replies above. At this point, many events "hope" to take place, but most are still in wait-and-see mode since "large gatherings" are still prohibited in most of the country. How far in advance events choose to declare a cancellation or postponement has varied, largely dependent on the arrangements with their venues. One other thing to consider is that even if an event is able to go forward, there's a chance that a significant percentage of the games they hope to have present may not be there as some portion of the attendees remain unable or unwilling to risk going yet. For the next few months, small (under 50 people) events hosted at individual arcades or homes in states that are "open" to some degree is all we're likely to see. At least there are some places that can do stuff, e.g. the Wisconsin stream last week. We're still totally shut down here in CA.
LTNS, hope you're doing ok.