Julian: - I do agree that some contents of the gallery were garbage or
spam application not even running on GAE, along with some really cute
applications. . This was a real problem but instead of fixing it (not
a very difficult task) they just dropped it without notice.
Also the gallery was a kind of museum where you could see how GAE
appls have been evolved in time from the early days circa April 2008
till now, always advancing using new features of the platform or as
the features were understood by the developers.
Now if they even do substitute this with a new site I doubt early
developers will go and resubmit their work.
So I only hope Google reconsiders this, fixes the problems related to
spam and classification of appls and restore the site.