There's also a brand new GOES sat for soft xrays of the sun at GOES Solar X-ray Imager that just came online last month or the Yohkoh Solar Observatory with soft x-rays also. If you're interested in satellite pics of the Earth you'll find a lot more options. Most are weather sats and you can quite a few worldwide if you run an internet search, but I recommend GOES Interactive Weather Sat. Imagery or NASA's Visible Earth which is a searchable directory of images.