An international group of teenagers discussed Um... the other day here; one person reported they heard me on NPR, someone else saying they had just checked the book out. Since it's apparently an international group, they also mention filled pauses in other languages they speak or are learning, which is cool: Chinese ("a 'nnn' sound"), Spanish (Es decir, pues), Danish ("It's also one of the hard parts of talking another language. 'Øh'and 'æh' is just in my head, so when I'm talking English I have to remember to say 'um'), and French ("In French they say Ben... (pronounced bang, kind of, but without the ng.")