Marchex’s local network attracts more than 25 million unique monthly users who rely on the company’s more than 150,000 local Web sites to get relevant and refine-able information about local businesses nationwide. Enhance Interactive provides additional distribution across local Web sites, online publishers, and leading search engines.

This sounds like a good partnership to me. Marchex offers phenomenal reach to potential customers. As long as local businesses have effective landing pages and overall good website usability, I can see the value in paying for advertising on their network. I’m hoping that’s what Idearc means by “performance-based advertisers.”