On the homepage click on the Attendee List/Networking Area. Here you can view the full attendee list and search by things like company name and job title on the left in the search bar.
You can either send a meeting request or send a connection request. Simply find a person or company you would like to meet with, click onto their profile and if you have meeting rights you will be able to propose a time to meet.
You can see anyone that you have sent meeting or connection requests under "My Schedule" on the homepage and then "My Networking". You can export all your meeting and conference session commitments to your outlook calendar in the same area, on the left-hand side just click EXPORT TO MY CALENDAR. If someone accepts your meeting or connection request, you will receive a notification in the top right corner.