[Update: Ooops! I should check the links that I paste into my blog posts!]

On the Flickr devt blog they've got some interesting experiences when building their IPhone version of the site that apply to building any light version of a website:

• Don’t Use a JavaScript Library or CSS Framework - roll your own
• Load Page Fragments Instead of Full Pages - ajax in the changed content, rather than reloading the whole page
• Don’t Build for Just One Device - all the world is not an iPhone :)
• Optimize Everything - trim file sizes and compress content
• Tell the user what is happening - load indicators

Read more on the Fickr blog.