We knew it was coming soon, and after perusing through Sprint's support website for the Palm Pre, it appears that today (December 28th) is the official release date.  According to the website, webOS 1.3.5 will offer the following:

• 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 as major as 1.3.1 or other versions of the past, but it's nice to see Palm continue to address concerns.  Keep your fingers on the upgrade button, download it, and let us know what you think!

Via: BGR