P. W. Singer gave an interesting TED talk about the use of robots in war . He briefly covered some of the ethical and social issues related to robot soldiers as well as showing many pictures of existing robots.
Since November 2007 there has been a request for Google Gears to support “Iceweasel” (the Debian name for Firefox due to trademark issues). Apparently supporting this different name is not easy for the Google people. If you visit the Google Gears Terms and Conditions page  then it will work with Iceweasel on the i386 platform – but not for AMD64 (or at least not my Debian/Lenny AMD64 system).
Charles Moore gave a disturbing TED talk about the “Great Pacific Garbage Patch” . Pollution in the oceans from waste plastic is worse than I realised.
Ressuka documented how to solve the Time went backwards problem on Xen DomUs . Run “echo “jiffies”> /sys/devices/system/clocksource/clocksource0/current_clocksource” or use “clocksource=jiffies” in your DomU kernel boot parameter list.
Nassim Taleb  has written Ten principles for a Black Swan-proof world , this is in regard to the current US financial crisis. It’s worth noting that he made a significant amount of money due to successfully predicting some aspects of the crisis.
James Duncan Davidson has some good advice for speakers based on his experience in filming presentations . Some of the ones that were not obvious to me were:
Take off your name-tag – it doesn’t look good
Stay in the part of the stage with the best light
-  http://www.ted.com/index.php/talks/pw_singer_on_robots_of_war.html
-  http://code.google.com/p/gears/issues/detail?id=313
-  http://gears.google.com/terms.html?platform=linux
-  http://www.ted.com/index.php/talks/capt_charles_moore_on_the_seas_of_plastic.html
-  http://ressukka.net/blog/posts/20090305_XenServer_and_non_citrix_kernels/
-  http://en.wikipedia.org/wiki/Nassim_Taleb
-  http://www.fooledbyrandomness.com/tenprinciples.pdf
-  http://duncandavidson.com/2009/03/dear-speakers.html