What a cool idea! You get five minutes on stage in front of a crowd to cover practically any topic you want, you get a slide presentation (probably made by you I imagine) that changes every 15 seconds whether you like it or not, so you have to time your talk accordingly. It's like Toastmasters for Generation Y.
You'd think five minutes isn't a long time, but once you're in front of a crowd with pressure to talk about something for that long, trust me, it's a LOOOONNNG time. Unless you're one of those people that LOVES attention and can't shut up, then perhaps it would be not enough time. Either way tho, what an interesting way to spread information! Especially because you get 20 pictures (correct me if I'm wrong because we all know I suck at math) and if pictures are worth a thousand words, then no matter how fast you talk, you just got an extra 20,000 words in!