Here is a list of some great blogs about blogging regarding rules and tips of blogging:
Six Rules of Blogging (That Also Apply to Twitter) – DailyBlogTips.com
Five Blogging Rules to Make a Great First Impression – ProBlogger.com
10 Blogging Tips for 2009 to Make It Your Most Successful Blogging Year Ever – BloggingTips.com
Top 10 Blog Tips – TopTenBlogTips.com
Of course, there are a million versions to what is acceptable and not acceptable in the blogosphere, but these are a great collection of links to reference … when in doubt.