In reply to Jay Oram:
It's a good question and the lack of responses is perhaps telling.
It seems to me that a lot of climbers these days use Instagram. God knows why coz the site is dire in almost every regard: no volume control on videos, low image resolution, non existent navigation and your not even allowed to post links which is an unpleasant way of manipulating people to stay on the site. But like or loathe it, and I definitely loathe it, that's where a lot of climbers seem to post stuff to these days.
The Project Magazine is more or less a blog and has some interesting stuff and good photos:
http://www.increasingthecalibre.com
Again not really a blog but it is the work of one man, OnBouldering.com is pretty good and regularly updated.
Post edited at 19:40