Yes, I'm running ads for Linux Mint: http://goo.gl/6Wet (screenshot)
I'm also creating conceptual art and branding for a Mint-based distribution. (It's essentially Mint, with trial versions of popular proprietary software that's Linux-native or highly-rated in WINE.) This distribution would be sold for $19.99, and all proceeds would go towards marketing/maintaining the distribution.
At close to a dollar per click ($0.80) for advertising, this wouldn't be inexpensive, but it's still worth it. Most users of Google Analytics (and not Adwords) recently received a $100 adwords credit. I used this credit to purchase ads for Linux Mint. I invite you to do the same.