A WikiHomePage that:
A home page that says no more than "gee this really works" isn't really a home page and is a candidate for deletion. However, if there is even just enough information to consider saving it here then I would suggest leaving the page in place. -- WardCunningham on DeleteAbandonedHomePages
If a page has contact information or a link to a homepage, it's probably best to leave the page, or at least attempt to make contact and giving a fairly long timespan in which to respond.