In addition to what Zottel mentions here's my current working ad blocking list which some may find useful:
Code:
/ad_banner
/AD_Banner
/adimage\.php
/adrevolver/
/ads/
/ads\.
/adserv
/adv/
/adverts/
/phpadsnew
/viewad/
/a\..*\.(com|net)
/ai\..*\.(net|com)
/as\..*\.(com|net)
/ad\..*\.(com|net)
promote\..*
/.*\.adjuggler\.com
/.*\.advertising\.com
/.*\.atdmt\.com
/.*\.blogads\.com
/.*\.doubleclick\.net
/.*\.eyewonder\.com
/.*\.falkag\..*
/.*\.fastclick\.net
/.*\.googlesyndication\.com
/.*\.intellitxt\.com
/.*\.kontera\.com
/.*\.mediaplex\..*
/.*\.overture\.com