From the top navigation menu, go to Membership > Member Resources, and you'll see Webinars and White Papers on this sub-menu.
If you're looking for live webinars to register for, you can see a ticker of all upcoming webinars on the homepage of IOFM.com — about halfway down the page on the left. You can also use the blue "Refine" menu at left on any search results page to filter for "APP2P Upcoming Live Webinars" or "ARO2C Upcoming Live Webinars," depending on your industry of interest.