Usability 
My first experience with the web on a handheld device was 7 years ago on a Palm PDA using Avantgo. The company provided PC software that downloaded "channels" to the PDA when ever you synchronized. Later I read the channels offline during my commute. Avantgo had hundreds of channels which were really simple html based mobile web sites. Avantgo is still around using the same basic business model. except that the Avantgo device software now offers the option of downloading channels over the air on connected devices. I just discovered that Avantgo also has a mobile web client. It showed up as one of the default sponsored bookmarks in Opera Mini 4.0. Avantgo is normally a subscription service but the link in Opera Mini lets you sample 7 feeds including Rolling Stone Magazine. Rolling Stone is an Avantgo exclusive, it doesn't seem to be available anywhere else on the mobile web. The Avantgo Opera Mini site works pretty well on on other mobile browsers besides Opera Mini. You can register for Avantgo on the mobile or from your PC to get access to all of Avantgo's approximately 1000 channels.
Avantgo shut down in 2009.