The much-anticipated beta patch came out tonight, and there are tons
of documented and undocumented changes. Here's a few noteworthy night elf changes-
-They now have to use workers to mine gold like the other races.
-Huntresses now start with 700 hitpoints (way more) but do less damage than archers (they used to do more than double the damage of archers)
-Druids of the Talon have been added, and they are trained (and upgraded) at the Ancient of Wind)
-Chimaeras now attack land and air units. I'm not sure if this is intentional or not; it's not documented anywhere and their description at the Chimaera Roost still just says attacks land.
-Keeper of the Grove is now a ranged attacker
-Keeper of the Grove's force of nature has been changed to summon a fixed number of treants per cast per level (though the area of effect circle comes up when casting, still).
-The bug that used to let Keeper of the Grove recast force of nature before cooldown started seems to have been fixed (not 100% sure since I never tried to do that before)
-pristess of the grove's wimpy "scout" spell has been given to huntresses, and the Priestess now has a better, but tougher, skill- Sentinel. This sends an own to illuminate any area surrounding any tree on the map. You can put your first point in it and maybe find your enemy's mine before you even have an army.
-you now can only put points to a skill every other level
-your hero starts with 1 skill point
-you have the option of beginning the game with a "random" hero from your race (either everyone does, or nobody does)
-there are less low level creeps, and creep AI is better- they will sometimes walk around your huntresses to attack your Hero, and they can cast net (maybe other things too) on you.
-formations are better- my hero wasn't getting ahead of my huntresses anymore
chat/game creation stuff
-we now have icons in the chatroom (though don't know if you guys get to see them. We can now see other games' icons, and even /whois by clicking on your name (how is that useful?)
-WC3 players can see each others' profiles which now include stuff like- "player level"- win loss record equates to a number that shows up right in your chat icon
-you can set stuff up at the beginning of the games like stopping people from switching sides, allow/disallow shared control of units, starting next to your allies, etc It looks like there's an observer button that's not quite functional yet.
more, that's just stuff off the top of my head, and much of it isn't mentioned in the readme.