A simple use for Google's iPhone interfaces is to add them as sidebars in Firefox or Opera. I mentioned last year some Google gadgets for Google Notebook, Google Talk, Google Docs, that could be displayed in a permanently-visible sidebar. Here are two interfaces optimized for iPhone that have permalinks:
iGoogle - all of the gadgets are displayed in a single column and you can switch between tabs at the bottom of the page.
Google Reader - a beautiful interface that lets you read posts inline, star them, share them and browse by tags or feeds. "This new version is designed to offer many of the same features as the desktop, while making it quick and easy to act on items," says Google Reader blog.
Normally, if you click on the two links for iGoogle and Google Reader in Firefox or Opera, you should be asked if you want to bookmark the page. To open it in the sidebar, go to the Bookmarks menu and click on the corresponding item or press F4 in Opera. If the links don't automatically create a sidebar:* bookmark them and select "Show in panel" (for Opera)
* bookmark them, then go to the Bookmarks menu, right-click on the bookmarks, select "Properties" and enable "Load this bookmark in the sidebar" (for Firefox).