Tools for measuring Internet connection speed, and also visualizing connection speeds throughout the world. Uses some of the lab projects from Google, like Google Storage and Google Fusion (I think). Connection speed is an issue in digital divide discussions.
A great summary of what "wired", "active", "inactive" and "free" means in the Mac OS X Activity Monitor app (in the Applications/Utilities folder). And how the Mac uses memory. Good comments, questions and responses too.
Technical info on Mac Flashback malware. See also http://public.dev.drweb.com/april/