A growing proportion of the Web access on the Internet is from mobile web browsers. This includes PPCs such as Blackberry and mobile phones such as the iPhone. It is becoming increasingly important that we support these formats, as more people begin using mobile technology to access the Internet.

In many cases, we don't need to do too much more to support them. The manufacturers of most mobile computers and phones do their best to support standard markup and CSS, so that Drupal sites will work fine out of the box. When theming, we probably won't go too wrong as long as we adhere to web standards.

However, there are sometimes design considerations that must be taken into account when creating a site. For instance, though many sites use a sidebar for navigation, it is more convenient for most mobile users to have a navigation bar at the top of the screen. Also, due to the small size of most mobile screens, it is usually easier to read content in a single column, rather than several...