I used Square Cash yesterday to settle up a $5 lunch tab with a TEDxBuffalo volunteer. In less than 2 minutes, I downloaded the app, entered the amount, typed in my debit card details, and sent an email to my fellow diner. He opened the email, clicked the link, typed in his debit card, and I got another email noting that he'd accepted the money into his account. Volunteers don't mind paying for the occasional soda or beer, but it's nice when they don't have to take a $50 hit for the napkins and bottled water someone forgot to buy ahead of time.
HelloSign for on-site signatures
Speakers at TEDxBuffalo need to sign releases, and vendors need authorized signatures, and people just crop up everywhere needing signatures on things, often when you're nowhere near them or a scanner and laptop.
Everything I love about HelloSign I have put into words in a previous post. It's worth noting again, though, that their mobile app is a perfectly viable and usually free means of snapping, signing, and sending off documents to people. HelloSign creates signature audit trails for those uptight corporate types, and impresses almost everybody else with its ease of use and delivery. Keep it handy.
As with project/task management tools, there are many, many services that offer live streaming video options. TEDxBuffalo has gone with Livestream this year and last, and we've enjoyed how straightforward the pricing and service has been.
If you're working with a video team for your event, they might have Livestream Studio (an $800 package, but video teams are used to these kinds of price tags), and can do all kinds of nifty things with slides and video and titles. If you're just winging it yourself, you can bring in simple DV camera feeds or iPhone video. And members of your team can use their Androids or iPhones to "grab" the feed and wander about, broadcasting what they're shooting live (you can see some of that happening at our live stream archive. Plus, Livestream's free accounts are none too restrictive, and upgrading to a few more niceties is only $49 per month (and easy to cancel when you're done).
You can't plan for every potential problem, but you can have some tools on hand for when things eventually break down.