Beautiful solar flare [BBC News] yesterday. The SOHO Project (that's the NASA 'site), as well as having a realtime measure of the solar wind on their front page (8.05 p/cm^3 at 395 km/s right now), have an impressive gallery of sun images. The current pick of the week is the same sun image as shown on the BBC article, with a high-resolution version also available (I'm guessing the page might be archive here, eventually).