Time Machine and Apple Remote Desktop
I tried a few times to use time machine on a Snow Leopard Mini Server. It appears to freeze the display. Then I found this little gem in Apple Discussion forum:
When attempting to access Time Machine on a headless Mac over Apple Remote Desktop, a common complaint is that the GUI (graphical user interface) does not appear, though it does function if you guess where the buttons are. To force the screen to redraw, just drag any file/folder from your local desktop into the Remote Desktop window, as if you were copying the file to the remote machine. You don't have to release the icon, but the screen should redraw with the Time Machine controls now visible and functional. Not all of the visual effects work, but you can browse past archives and perform restores with ease.