Say what you want about influence and whether it correlates to anything useful, but there are some pretty serious tech comm chops on this list of MindTouch’s most influential technical communication bloggers.

(Though, as a side note, I’d argue that using Alexa ranking as a mark of influence or any reliable source of traffic stats is pretty suspect. See what Darren Barefoot had to say about site ranking tools here: http://www.darrenbarefoot.com/archives/2010/07/more-evidence-that-compete-alexa-and-quantcast-are-largely-bollocks.html)

Without further ado, the list:
http://www.mindtouch.com/blog/2010/07/29/the-most-influential-technical-communicator-bloggers/