Everything. Yes, planetary battles works as well.
What does not
What was not tested
I run everything under wine in virtual desktop mode (see winecfg) and window scales to 1024x768 in this case, so it's almost the same as windowed mode. Game crashed just once after killing few rangers (over 50 hours played in total). Apart that, everything is ok. You need d3d DLL's overrides to run the game.
|Operating system||Test date||Wine version||Installs?||Runs?||Used|
|Show||Arch Linux x86_64||May 20 2011||1.3.20||Yes||Yes||Silver||an anonymous user|
|Current||FreeBSD 8.1 x86_64||Oct 13 2010||1.3.4||Yes||Yes||Gold||Hedgehog|
|Show||Gentoo Linux x86_64||Jun 23 2010||1.2-rc4||Yes||Yes||Silver||Rion|
|Show||Slackware 13.0||Dec 26 2009||1.1.35||Yes||Yes||Platinum||Bogdan|
|Show||Gentoo Linux x86_64||May 01 2009||1.1.20||Yes||Yes||Gold||Jazz|