With all the rigmarole surrounding what may or may not be happening at Bardarbunga, I thought I would put together a little guide of where to get RELIABLE information and comment. The main source of reliable information is, obviously, from the Icelandic Meteorological Office (IMO), update page here. The IMO really is the best and only source needed - primarily because they are the experts on Icelandic volcanoes and how they may or may not behave! For a detailed description of the area experiencing the unrest see this report on the volcanic system.
As with all volcanic activity there are a number of potential outcomes (for information on these see the IMO website update for the 26th August at 15:45), as such, any blogs or posts which pertain to one exact event happening are unlikely to be trusted! As always though the Eruptions blog by Erik Klemetti is a good and informative read.
There are also quite a few nutters on Youtube these days, so I would be very careful what you watch there.
Below is the twitter feed for the hash-tag Bardarbunga, which, among random posts, should show the most up to date news. Tweeters to look out for are @HTuffen, @Sim0nRedfern and @subglacial. This is of course not an exhaustive list! Don't forget to keep an eye on the webcams too! Links here and here, (the former link does not currently seem to be operational).