This is one of my non-music projects I managed to find time for recently (major overhaul - site was 6 years old and showing it). You can use it to get an idea of various trends using web search results.

For example: (had to use tinyurl, otherwise links were broken)

When do people start/finish their remixes? [compare-stuff.com]

The rise of creative commons/ccMixter. [compare-stuff.com]