Compás This site is geared toward guitarists, but it has flamenco metronomes where you can hear the different rhythms: Ravenna Flamenco. One place to go for explanations is Flamenco En Beirut. If you're interested in purchasing something, the Solo Cómpas series is great for practicing with.
Palos Some resources: Studio Flamenco.
History and stuff Many of the above links have a lot of historical info. This is a good article and quick read on the history of flamenco and where it's going. The Junta de Andalucía and Horizonte Flamenco have a lot of info en español.
Learning more The Vida Flamenca blog featuring the latest flamenco documentaries and videos from our local, national and international communities. And, for those who like to do it in Spanish with worksheety type of stuff, try Didáctica del Flamenco from the Centro Andalúz de Flamenco.
How-To Posts - Click here for how-to articles on this site
Sevillanas steps Click here for the steps and explanations
What do I need to know before attending a class? Click here for some Frequently Asked Questions