I have a website whose traffic is predominately repeat users. As such, CPC-type ads such as Adsense don't monetise very well at all. The site is PR3 and receives about 1,500 uniques/day (about 8,500 individual page loads). I'm wondering if anybody has any suggestions as to what would be a good advertising network to switch to, I imagine something more CPM-oriented would be better. Thank you.
Your question is too vague. You need to find out cpm advertisements IN YOUR NICHE. Go to the marketing forum: http://forums.digitalpoint.com/forumdisplay.php?f=21
Well provided that your site meets the requirements Valueclick and Casalemedia are really good CPM ad networks. I've been using both for two years now and am happy with their performance.
TribalFusion is a good CMP ad network. However they have some requirements like 2000 uniques daily from USA, etc.