If you don't see an add-on provider that was on the old site you can go to them directly via their url. For instance Loggly isn't there but you can go to...
Interesting that they seem to be de-emphasizing their own options (Heroku provided Memcached, etc.) in favor of partners.
Heroku doesn't provide Memcache, it's provided by Couchbase or MemCachier.
The branding was too subtle on the Couchbase Memcache offering. New question: where is the Couchbase Memcache offering on the new addons page?
Updating documentation to be consistent with the rest of our add-on docs in Dev Center is a requirement for being displayed on the main page. We're still working with a few providers to bring them in line.
curious, why was the title changed?
Various elements of the page are being split tested :)
Oh, did you mean the title of the HN post? Whoops.