If you host your domain on WordPress.com, this is your chance to monetize your blog. Not sure if they will release WordAds for everyone as currently they are picking those blogs that is eligible for this program base on traffic, engangement, content and language used. The biggest barrier I am seeing is that an individual will need to use custom domains, which means purchasing their own domain name and mapping it there. WordPress.com does it for USD17/year.
A big step for WordPress to earn some money and attract more bloggers.