Has My Blog Been Hacked?! What Is This Stuff?

I found some weird error listings in my error log for my blog. Stuff like this:

http://www.dotpor.ru/map.html
http://www.fligit.ru/map.html
видео порно � Берковой
http://www.gaffer.ru/map.html
http://www.hekker.ru/map.html
http://www.obaldel.ru/map.html
http://www.vipsek.ru/map.html
http://www.vnepravil.ru/map.html
http://www.risovka.ru/map.html
http://www.seksgun.ru/map.html

and this

WordPress database error Illegal mix of collations (latin1_general_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation ‘=’ for query SELECT comment_ID FROM wp_comments WHERE comment_post_ID = ‘349’ AND ( comment_author = ‘Silent Ringtone’ ) AND comment_content = ‘Silent Ringtone…

Ghost Ringtone

High school musical Ringtones

Hot Ringtones�

…’ LIMIT 1 made by wp_allow_comment
[07-May-2008 10:17:03] WordPress database error Illegal mix of collations (latin1_general_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation ‘=’ for query SELECT comment_ID FROM wp_comments WHERE comment_post_ID = ‘243’ AND ( comment_author = ‘Idol Ringtones�’ ) AND comment_content = ‘Idol Ringtones�…

Adult Ringtones

Aflac Ringtones

Akon Ringtones

…’ LIMIT 1 made by wp_allow_comment

What does this mean? Can anyone help? I’ve been getting mysterious CPU Quota Exceeded Errors from my web host, and am trying to find the cause.