Marcus is wearing a Hurd T-shirt: in the middle, the Hurd on the right. Neal is in the Hurd T-shirt on the left.
The stitched images were made, unfortunately, with non-free software that shipped with the camera. The Canon Powershow S10 camera works very well with a small utility called s10sh, the URL for which I cannot remember at this point in time.
Check out more pictures on the LSM site at lsm.abul.org/cam/photos.php3.