Web 2.0 seems to be all the rage these days. One cannot go to a library conference and attend presentations or stroll down the halls without hearing some mention of it in magical tones reserved for some great discovery. The excitement surrounding Web 2.0 reminds the author of the frenzy that gripped the country between 1848 and 1855, when prospectors flocked to California (in what became known as the California Gold Rush) to seek their fortunes in the gold fields. In this article, the author talks about the application of Web 2.0 technologies in the library.