Last week I set up Passion Fruit ads on my blog. I have three sizes starting at $6, and also trades available (shoot me an email me if you're interest in trades!) Also, for today only I have a special discount code! Get 20% off any ad with promo code "owlcity"! Valid until I get home the Owl City concert tonight! (I'm guessing it will be around eleven or twelve.)
Buttons go up as soon as I approve them (except the TARDIS size, that one will be queued until March 26 when it opens up again), and run for 30 days. For more sponsorship info + to purchase an ad check out my sponsorship page!