The forum at sciencemadness is one of the most welcoming and knowledgeable places on the net for a chemist, or student.  There is a huge wealth of information there if you take the time to search for it, and there are intelligent people at your beck and call 24/7 providing you show and honest interest in the subject.  It gets my highest recommendation.

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Bromic Acid's Webpage.  My experimenting alter-ego.  Check out the book project for an attempt to make a comprehensive guide for experimenting at home as well as the more memorable mistakes that have happened during those said experiments.

Wolen's page is a wonderful chemical experience.  Lots of beautiful pictures and very unique experiments really show this experiments love for the craft.

Frogfort's page covers yet more the chemistry at home aspect of things especially the synthesis of a number of useful reagents.