I was surfing ESPN over the weekend, mobile on the G1. Like most you glance but ignore the ads near the top, when I noticed that the ad had an Android-esque icon design, so I looked a bit closer and it was an ad for the Visa app, telling me to try it out and with a link to install it now. I don't have the right Visa bank card, I forgot which bank it worked with, but when it was released I knew I didn't have a Visa card from that bank so I didn't install it. But it was very cool to see an Android Ad on my G1. A targeted ad. See if you visit espn's mobile site if you can duplicate this. (It was not on the main page.) I wish their was a way to capture a screenshot, so I could post it.