In playing around with my linode, there have been plenty of times when I've deleted the disk image for a running linode. Once I created a new distribution image while the deleted image was still running, and ended up shutting down the server, deleting the image, and recreating the image again because of concerns about corruption from the old running server on the new image. (I don't know if that concern is warranted or not.)
Seems to me it would be pretty simple if, in deleting an image, linode.com would either shut down the server gracefully or refuse to continue until the server was shutdown.
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John Schofield
Apple Certified Technical Coordinator
Office Mechanic Consulting
Mac, Unix, and PC Computer Support
www.officemechanic.com