WorldCon is also looking for online volunteers to help with the virtual event track:
https://docs.google.com/forms/d/e/1FAIpQLSeI05FPflQIktKGcNwKXHWOiOAFCjZQcCvII254bdAFTNSK2w/viewform
As a heads up, signing up for 12+ hours of volunteering over the course of the weekend will get you a virtual pass to the convention as well as an unpublished novel from Mary Robinette Kowal.