I (Troy) have now made this blog (at spacecolab.wordpress.com) public.
If you are a member of the Space CoLab group in SL and would like to blog here, then go to wordpress.com, get a wordpress.com account, then send me your wordpress.com email address (e.g. by sending me an IM in SL).
You can also get to this blog by visiting spacecolab.org
If you’d like to use the visual rich editor when you are writing your blog posts, then log in to the control panel / dashboard for spacecolab.wordpress.com, click the “Users” tab, then the “Your Profile” tab, then check the box beside “Use the visual rich editor when writing”.