By coincidence (someone asked me to help look for a bloggingscript) i had a browse around hotscripts.com today and came across a pure php bloggingscript (no MySql needed). It's easier to modify to your own likings i think (you host it yourself and use your own css), but then again i'm not a blogger
This is the one i'm talking about:
http://www.jlwebworks.net/
More blogging scripts can be found
here 
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