Wow, that was actually impressive. A few of those were hard to distiguish from human speakers. I love how they included breathing and mouth-sounds as well, really brings it to life.
The "babbling" samples here are really fun. Would make for a great "Sims" language.
I actually found that pretty unsettling to listen to, and verging on creepy. I felt like I was listening to a computer trying to pretend to be human.