They suggest trying

The coolest weather imagery on the net comes from the Space Science and Engineering Center at the University of Wisconsin, Madison. The gopher server there is the source of the nice composite US/IR image.

Another fine set of weather information comes from the Department of Atmospheric Sciences at the University of Illinois, Urbana-Champaign. Its nifty stuff, however I personally feel they've gone way overboard on the graphics that get you to the weather imagery your interested in. But then again, that seems to be the common (and disappointing) trend in the web these days.

The GOES data set I provided (in high resolution) comes from NASA, specifically ftp://explorer.arc.nasa.gov/Weather

And the imagery from the other side of the planet is available (Very nicely) from The University of Nottingham.