The slides for other years are available on the .conf website (http://conf.splunk.com/sessions/2016-sessions.html) and I have heard that the same will be done for 2016. However it generally takes them a good few weeks to get them prepared and onto the website. A little more waiting I'm afraid!
Yep, the slides and recordings will be available for download in the coming weeks. Just be sure to periodically check the link lguinn provided. That's where you'll find everything once it's available.