mil2k - 9:12 pm on Dec 2, 2003 (gmt 0)

has this happened to anyone else...

There are previous instances where this seems to have happened. You can try and sticky the respective persons who were affected in these threads :-

Google Partial indexing? [webmasterworld.com]

Google slow death? [webmasterworld.com]

But for these guys it was not during an update that the site disappeared. It was just before the Godaddy server issues. And the site did not disaapear overnight. It started first by decreasing the number of indexed pages, then titles and cache disappearing and then finally thrown out of index. If you contacted google you got a canned reply about Partial indexing. Some of the sites in concern were PR 5.