Google Content Network Spying

Anyway possible to find out what sites my competition are advertising on on google content network? (Placement targeting)

To my knowledge, there's no quick way to do this like there is with the Search Network. One thing you can do is search Google for your keywords, and see if there's AdSense on any of the top-ranking sites. If so, make a note of the advertisers and their ad copy/banner. If you take the time to do this every day and notice the same advertiser(s) on the same pages consistently, then chances are, they're placement-targeting those pages and/or bidding high enough to be seen.