Take it a step further by inviting your guest speakers to create their own posts. (elearningindustry.com)
Alternatively, host your own webinar and simply invite guest speakers who have in depth knowledge. (elearningindustry.com)
You can also invite guest speakers to present during the event, which would require locating them, background checks, and scheduling issues; however, the payoff might be worth it. (educationworld.com)