I'm not entirely convinced by high dynamic range (HDR) photographs. Used subtly, it can be an answer to a particularly vexing problem for photographers, namely how to cope with extremes of contrast in a photographic subject. Used unsubtly, it simply looks gimmicky. It's easy to get tired of HDR photos, with their distinctively other-worldly look.
That said, while I was in San Francisco this weekend I couldn't resist playing around with the HDR app that I downloaded for my iPod Touch. Here are some of my experiments.