In some companies, the first thing to go during economic difficulties is the marketing budget. That decision has never made sense to me — why would you cut efforts whose sole function is to increase sales and revenue? If anything, companies should step up their marketing efforts when money is tight.
Brian Soles at TechCrunch wrote a great piece about going after influencers. He calls it "marketing to the echo chamber," and he's absolutely right.
I can name a company here in Colorado that is stepping up that kind of activity — 34 Degrees. They're increasing their presence on Facebook, and sending out samples of their crackers to people they think will talk about them (yes, I received a box; but I won't write about my impressions here...yum). I'd like to see the company increase their presence in social media. I'll certainly do my part by telling my peers about them; 34 Degrees is not a WideFoc.us client, but I am a fan.