A new survey conducted by Blogads of over 36,000 readers of blogs reveals distinct segments - "There are multiple blogospheres," says Blogads CEO Henry Copeland - with four major types of blog readers (political, gossip, mom, music), ClickZ reports. Many advertisers "don't get the degree to which these are self-contained universes…. This is not a basket of eyeballs; these are very interwoven communities," Copeland says. Political blog readers seem the most engaged. The plurality read five blogs a day; in the last six months, 70 percent have contributed to a cause or campaign online - and 60 percent bought software or clothes online - with 41 percent spending $100 or more.

Some 72 percent of political blog readers are male; 77 percent have a college degree; over 20 percent have a household income between $60K and $90K. Though a younger bunch, music blog readers are more than 72 percent male. Some 86 percent have bought music online in the last six months, and 47 percent spent over $100; 70 percent bought books online, and 63 percent bought clothes.

Some 77 percent of gossip blog readers are women, and half of them are age 22-30; more than 60 percent have a college degree; 68 percent purchased clothing online, and over 48 percent spent more than $100. Readers of motherhood and parenting-related blogs are 90 percent female; over 12 percent read five blogs daily; more than 17 percent spend two hours a week reading blogs; 72 percent bought clothes online in the last six months, and 46 percent spent over $100; 83 percent purchased books; 46 percent contributed to a cause or campaign; 23 percent bought toys.

More than 45 percent of mom blog readers are 22-30 years old; more than 73 percent have a college degree; over 21 percent have household income between $60K and $90K.