This topic came up at the Bangor event. I've never actually seen one, but since they are caused by satellites, (and you need lat/long to predict/view one), I thouht I'd mention it here.

Here is a link to a site that predicts (among other cool things, like the postion of the ISS) where (and when) Iridium Flares will occur. I'd like to hear from folks who've actually seen one.

http://www.heavens-above.com/