When I tried the coupling scene in the Xoom camera, it seems to work fine. I could take my pictures, but didn't find the saved picture. After the camera switched to play-mode, Xoom just showed the previous picture.
Then I installed the astro file manager and found the taken pictures, including coupling, comic and panorama, are stored in the folder: /sdcard/sd/DCIM/Camera/. The pictures can be viewed in gallery and astro viewer.
Does anyone have a solution for this issue?