I have ad space available for various subjects and themes. PM me if you have any specific questions or comments. Thanks!

"Web" related: design, seo, hosting, internet tools, computers, etc...
http://www.rlinedesign.com
75 unique visitors/day & 250 pageviews/day
inside page: $15/month

http://www.redlineseo.com
50 unique visitors/day & 150 pageviews/day
inside page: $15/month

http://www.seoproject.com
150 unique visitors/day & 2500 pageviews/day
forum main page and all forum subpages: $40/month

Sports related (football, basketball, & poker)http://www.miamifootball365.com
homepage: $35month
forum pages: $50/month

http://www.realfootball365.com
4 different NFL team main pages...you choice of AFC East or NFC East: $24 per division (4 teams per division)

http://www.heat365.com
homepage: $25/month

Education related
http://www.universitydegreefinder.com
homepage: $30/month
inside page: $15/month

Entertainment & Consumer related
http://www.firethefcc.com
100 unique visitors/day & 500 pageviews/day
homepage: $28/month
inside page: $10

http://www.shipsolution.com
50 unique visitors/day & 200 pageviews/day
homepage: $25/month