Food for thought: RSS feed basics
Content syndication can make a big difference. The beauty of WordPress is that it automatically produces a separate RSS feed for each category that you create (http://www.yourdomain.tld/category/category-name/feed/). Each site also has its main feed that includes all content (http://www.yourdomain.tld/feed/). Moreover, comments can be subscribed to just as easily (http://www.yourdomain.tld/comments/feed/). Even custom post types can have their individual feeds. This is important to remember, because each one of these feeds can be marketed as its own channel of information like a newsletter, without the extra effort. All mobile site visitors are able to use their feed readers, subscribe to a particular feed, and view the site content as if it was specifically tailored to them. You only need to provide your visitors with the feed link and a prominent wording for them to subscribe. The call to action is a simple yet crucial step, since they will not hunt down your RSS feeds by themselves; you have to spoon-feed your visitors.