Some things I forgot to mention in my presentation:

• I often use a User Agent switcher to test new functionality in Firefox before I do my actual mobile testing. You can set your user agent to various phones to see how your template logic works out. Firefox 3.5 supports geolocation and some of the HTML 5 storage functionality, so it's not that bad for testing.
• There are some frameworks designed specifically for an iPhone look and feel; I haven't tried any myself, but they may be worth looking at if you're going for a more native-seeming experience. Some that look interesting are iUI and PastryKit.

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