I really hate Keyhole. For the main reason they charge money to access those images.

For anybody that doesn't want a trial or monthly fees, check out my previous post on NASA's WorldWind. A Free OpenSource Keyhole like piece of software.

Another neat thing about WorldWind is the MODIS mode that shows natural disasters from space! Like fires in the Los Angles area. Another thing i've read on thier forums is they are working on getting 24hour old data in a higher res than the LandSat 7. So, soon we will be able to look at our world in remarkable up-to-date images!