Spark

Thanks everyone for the input. Any other suggestions?

This site still does not contain all features yet, but is functional for its intended use. How is its usability, interface, design? What improvements should be made and what have been done well? What would help information wise to better understand things? What would make you want to join? What would turn your off/away from this site? What features should be added? Can you find any security flaws? Any other suggestions or comments?