There are thousands of Google gadgets you can add to your iGoogle pages, from email checkers, games, even (wow, over 70) Twitter clients. The framework for these gadgets is flexible, allowing most of them to work not only in iGoogle but also on your PC using Google Desktop and in Gmail as a labs plugin. So when we write about a particular gadget, although it may not get as big as an iPhone app, there's still a lot of potential there.
The Google gadget called What's Popular came to our attention thanks to Steve Rubel's blog Micro Persusion. His take is that it has the potential to rival Digg. While we think that might be a bit ambitious, we definitely think the gadget is a lot of fun.
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Using the What's Popular gadget is simple. Just visit its gallery page, click on the 'add' button and you are done. Once you visit your iGoogle page, you'll find it running and already bristling with popular stories and links. By default, What's Popular finds trending content on Google sites like News, YouTube, and Reader. You can also submit links to it for consideration.