Hey Derek - this is a modified version of phpFox - http://www.phpfox.com/ Not sure that it would be good in a blog format because of the framework in place. There is quite a bit of modding that needs to be done in the code to make it behave as you want, which might suck come upgrade time.
I looked at Drupal and PHP-Nuke - http://phpnuke.org/ recently. I like them both, and would have to look deeper if I decide to change Chillaxnet some day (which I have considered). I am currently using b2evolution there, and it is OK.