No official announcements from Palm, but the Sprint support website seems to have spilled the proverbial beans on webOS 1.3.5. Listed with a release date of 12/28/09, and fixes that include:

– Improvement in battery life optimization when in marginal coverage areas.
– QCELP capability fix to allow play and audio of video sent via MMS.
– Launch Google Maps or Sprint Nav when tapping an address from contacts.
– Minimized package of MR size through binary difference. Customers can now download over 2G connections if necessary.

Not the most mind-blowing release notes, but all you webOS sympathizers keep your eyes peeled and your fingers on the update trigger.