I've just performed an overhaul on the website.
(1) All the documentation has moved location. Old URLs should redirect to the new ones.
(2) There is a search capability that searches the pages of the site. If it doesn't return what you are looking for, then there is a customised google search available from the search results page - so give that a go.
(3) There is a Wiki available. Follow the Wiki link in the navigation menu. There's pretty much no content on it right now, but it's a place where you can make a contribution. Let your fingers do the talking :-) If you use RSS, then you can pick up edits to the wiki from an RSS feed - you'll find the link on the Home page.
Otherwise you should recognise it pretty much as before.
Please take a look: http://perl-win32-gui.sourceforge.net/