For anyone that doesn't keep track of the official forums: http://forum.hirezstudios.com/phpbb/viewtopic.php?f=345&t=102401
According to the dev blog, a single-purchase option for Tribes: Ascend that unlocks all classes, weapons, and perks available will be available alongside the new patch (due 2/15). From the looks of it, VIP players will also get a discount, so it might still be a good deal for those of us that have already poured a ton of time and/or money into the game.
Yea, just released on Steam: "Tribes: Ascend - Game of the Year unlocks all weapons and perks from: the Cloak & Dagger update, Raid & Pillage update, Tartarus update, Staying Alive update, Accelerate update, Stonehenge update, Twinfusor update, Bliz update, Marksman update, Revolution update, plus the new Shocklance.
For a single purchase you unlock ALL weapons in the game (over 110), all classes (9), all perks (21), and the new Shocklance weapon."