Several consecutive months of declines in US search market share per Compete’s measurements finally halted for Yahoo in April 2008.

Well over two-thirds of the US search market’s queries passed through the digestive tract of Google, while its next three closest competitors gave up share.

An across the board 5 percent drop in US search queries last month probably should be attributed to a naturally occurring phenomenon – fewer days in the month.

ComScore today released their numbers for December 2007 and Google took a bit of a slide. Here’s what happened in December:

All the press and the industry observers talked about last year was Facebook, which made it seem like MySpace was soooo 2006. Social networkers, though, must not have been paying too much attention.

According to data from Hitwise, MySpace pulled in 76 percent of US visits to social networking websites in 2007, and 95 percent of them were return visitors in December. This can be interpreted that not only is MySpace commanding the vast majority of the social networking market, but also inspires some pretty fierce loyalty.

Websites in the health & medical and the travel categories received substantial traffic driven to them from search engines in November 2007.

Google picked up more than 65 percent of the US search market in November 2007, while Yahoo, Microsoft, and Ask all ceded a few tenths of a percent each in share.

Time Warner’s sites including AOL saw a teensy drop in US search market share in October as well. Guess who gained?