If you're interested, or unsure, take a look at the Call for Content section of the event web site. You don't have to be the world's most eloquent speaker, nor do you have to be a SAS guru. Forum attendees are always keen to pick up nuggets of information from fellow attendees.
The benefits to fellow attendees are obvious, but there are several benefits for speakers too. It's great for professional development; it will reflect well on you with your employers or clients; and you will be surprised how much you will learn as you go through the writing process. And if you're still not convinced, be assured that you can supported by a mentor too.
Go on, give it a try!...
Note how the event appears to have shifted one day later in the week than normal, i.e. in 2016 it will start on a Monday (pre-conference tutorials?) and then run from Tuesday to Thursday. And the favoured twitter hashtag no longer contains the year. Goodness, it's all change at SGF!!