Update out and... Nothing.
Now for digging.
Medusa Lines:
http://pastebin.com/cP7DG0uu
It looks like the Halloween version of the map will be called 'Diretide'. There may be some sound files for it included, I'll have to see later.
It looks like they may be rigging up the chase animations a bunch of heroes have been getting.
"DOTA_Item_Announcer_Pyrion_Flax" "Announcer: Pyrion Flax"
"DOTA_Item_Desc_Announcer_Pyrion_Flax" "DO NOT SHIP THIS ITEM TO PUBLIC."
A bit more on the Essences and eggs. You do seem to use the Essences on the eggs, and the eggs seem to keep track of two values, 'URYBEssenceLevel' and 'OPGBEssenceLevel'. The Essences will expire on November 11th, so they are going to be a limited promotion.
Sounds for Tiny and Weaver have had minor updates. Tiny now has sounds for his scepter tree.
Nightstalker and Razor seem to be getting prepped for items now.
Slark has Portrait information now. Beastmaster, Batrider, and KotL have updated portraits.
The next free item ID for some reason is now 227 instead of 216. Maybe holiday themed variations of the items? Or just some odd quark between test and live.
New Ambient Sounds for the Diretide map:
http://soundcloud.com/drkirby/sets/dire-tide
While most likely no one cares, a lot of the PNG files have been replaced by dds files.
There is a model for a barrier in the tutorial, but it is missing a file so I can't open it.
There is a new team logo called "Radiant Fall", most likely for the holiday map:
Pumpkins!
Wax seal thing that is likely for teams:
My Prediction: Halloween version of the map rolled out in 1 to 2 weeks, with Slark and Madusa being the "scary themed" heroes to go with it.