Facebook marketing company Pagemodo just released an interesting infographic that explores the ongoing – and often frustrating – search for social media marketing ROI.

Among the takeaways: 20% of the business owners surveyed said social media marketing was producing measurable ROI for them, and 64% say social marketing is “a promising tactic that will eventually produce ROI.” The latter group is obviously bullish on social marketing, but they’re also inclined to invest conservatively while they figure out how to quantify the results.

Another interesting point: Of those marketers currently measuring their success, 35% said they tracked “qualified leads from social media” and 25% tracked incremental sales. We love seeing numbers like that, because those are the kinds of hard ROI metrics that drive a successful, sustainable social marketing strategy.

-Matthew McKenzie