Several months ago, reports of the WiFi near the Beach Club lobby was open to the public as opposed to the traditional means of charging for it. While some speculated that it must have been in error and would only be temporary, recent reports not only confirm it’s still available in the common areas at the resort, but that resort staff has confirmed it was an intentional, permanent change in policy.
This has now appeared to carry over to other Convention resorts (which all offer WiFi in public areas such as the lobby and pool areas) as we have seen reports that the Contemporary Resort also makes WiFi available at no charge.
Taking it even a step further, multiple reports (and iPhone screenshots) have confirmed that there is free WiFi available inside Innoventions East at Epcot (see photo, courtesy of @jeff318).
There have also been reported free WiFi spots in other parks, such as near City Hall in the Magic Kingdom.
Note that this does not affect the wired internet available inside the resort guest rooms. Non-DVC guests will still be charged to access the internet from inside their rooms.
It is also worth noting that you may occasionally see an open network for TWDC Guests. While you will be able to connect to the network, chances are it will require a login as it’s intended for Cast Members and their direct guests only.