- Guild Wars 2's digital versions are 50% off through the official website until December 7th.
- World of Warcraft -- well, the bundle with everything but Warlords of Draenor -- is 75% off through December 2nd.
- WildStar is on sale for 50% off, so $19.99, for a "limited time" on the official site and at other retailers.
- ArcheAge has a bunch of marketplace items on sale, along with two new mounts.
- Today only, SOE is offering double Station Cash, spendable in most of its MMOs.
- Star Wars: The Old Republic has hinted that a large (possibly hourly) Cartel Market sale is on the way today.
- All of Perfect World's MMOs have sales running over the next few days; of note to us are sales in Neverwinter, Champions Online, Swordsman, and Star Trek Online, the last of which is offering not just a cash shop sale but a sale on lifetime subs.
- Lord of the Rings Online is offering double bonus points in its cash shop and bonus XP in-game.
- Wargaming has festivities and sales planned for World of Tanks and World of Warplanes.
- Dungeons and Dragons Online is offering +20% XP through Sunday.
- RIFT is not only selling the classic collector's editions, character slots, and bag slots at 50% off but making the newest expansion available to buy via credits for the first time.
- TERA has a slew of cash shop item goodies on sale, including bundles with mounts and character slots.
- Marvel Heroes' multiple sales extend to Cyber Monday. (Update: MJ tells us that logging in Saturday will grant you a free remote-controlled Blackbird jet pet!)
And don't forget all the MMOs and MMO bundles/DLC on sale on Steam for the fall sale, as well. Elder Scrolls Online and The Secret World are among them!
If you know of others -- and we're sure there are several -- sound off in the comments!