WOW!!!
NASA releases new 3D image from Spirit rover on Mars (JPG, 1 meg image)
3D blue-red glasses needed. I've got some, and this image is just incredible - you can really see the undulation of the terrain in front of you. Almost as good as actually being there.

High Res 3D Mars image
24 Meg TIF & 1 Meg Jpeg available from the above page.

Second image of Comet Wild-2 released by Stardust team