In response to this U.S.-only requirement, I have restricted YPN ads on one site to just a small handful of pages with content of little or no interest to foreign visitors. (On two other sites, all pages are potentially of interest to a world-wide audience, so no YPN ads at all on those sites.)

Moreover, on those few pages, I have chosen an ad category (telecommunications providers) that should be geo-targeted to U.S. audiences. (Unfortunately, general interest ads with potentially world-wide appeal still show occasionally.)

So, I am displaying single-category, off-topic YPN ads on a small collection of low-traffic pages on just one of my sites. This effectively cripples my participation in the beta program. I might avoid the non-U.S. visitor ban, on the other hand, Yahoo might disinvite me for reasons of low traffic.

Sigh. I can't wait for YPN to go fully international.