Here’s a tip from the WordPress.com support forums that I want to share with mobile users.
I just installed Twenty Eleven theme and it’s working fine on the computer, however, when viewing on the iPad, none of my sidebar widgets show up on the side…they are all at the bottom of my posts.
Nov 21, 2011, 12:03 PM
By default, we turn on the “Minileven” theme when your site is viewed with a mobile device. It’s a special theme designed to make blogs easier to read on mobile devices. Sidebars are meant to appear below the posts in order to provide as much space as possible for reading.
Nov 21, 2011, 5:06 PM
Reference link: Note the “responsive-width” tag on themes in the Themes Showcase indicates which themes have this feature.