Recently, is has come to the attention of the Vuln-Dev Security Mailing list, (http://www.securityfocus.com) that there is malicious code that deletes one's home directory upon execution.
This brings up a good topic about UNIX data recovery.
Currently, I know of no method of recovering data with a utility of some sort. Such as an MS-DOS style "undelete" or what have you. The ext2 file system that is used on most Linux systems does not allow for undelete. So, even if a utility was devised it would have to be for a different file system.
I seem to remember coming across an article about how you could remap sectors of a hard drive to recreate the data structure, but that wa s a long time ago..
Back to my point.. If anyone has any information on UNIX file recovery, please post. This would make for good discussion, and help me out. ;-)