Here are some more additions to various “The Best…” lists:

Groupie Guide is the newest addition to Not “The Best,” But “A List” Of Social Network Sites.

Here’s a video from The Associated Press and another one from The Sydney Morning Herald showing the second spacewalk to make Hubble repairs.  I’ve added them to The Best Sites To Learn About The Hubble Telescope.

I’m also adding PB Works, formerly PB Wiki, and Wikispaces to Part Two Of The Best Sites For Students To Easily Create & Display Online Projects. The best explanation I’ve seen about what a wiki is and how it works is at the Ask Auntie Web blog. It has a great step-by-step guide to using Wikispaces.