alright so zbrush noob here. Recently ive been noticing that zbrush is really the way to go for 3d art these days, apps like max are becoming obsolete and im ready to jump on the cool wagon with you zbrush guys. (note, this thread is not about whether or not max is becoming obsolete.. i know someone would argue about that sooner or later so dont.)
So far ive figured out the extreme basics. Previously ive made some random things in zbrush such as a few arm meshes to use for fps games, so i've got the fundamental GUI thing figured out (or atleast the basics)
what i cant figure out is how people make such awesome art in zbrush.. some stuff ive seen here is just jawdropping..
so ITT post some zbrush tutorials that are awesome

what im currently most interested in is how to make stuff like
this.. i just cant figure out how to make my mesh look like skin (all those pores and wrinkles and scars etc)
Replies
http://www.pixologic.com/zclassroom/homeroom/
http://vimeo.com/pointpusher/videos - Danny Williams, most of these are not tutorials just time lapse of him working. Still good to see.
A few ZbrushCentral Threads that are really inspiring...
Mutte
TXIKIDESIGN
ParkParkin
... There are a ton more amazing threads on ZbrushCentral. You can check out the Top Row for some "highlighted" works
Generally a mixture of alphas with spray mode and some manually worked areas. A lot of time spent, a great amount of skill, and an advanced knowledge of anatomy.
ive kind of noticed that on my own.. i was hoping it wasnt so but i guess it is.
Beyond that, what gsokol said. The ZClassroom videos are great for getting a solid overview of what the tools do and what the mechanics of the program are. Run through those ... start to finish ... and you'll be in a good place to get started. You'll know about brushes, alphas, layers, subtools, etc.
And another vote for Eat3D once you're through ZClassroom. It's not free but man are they good.
As to how to make great art in it. Well, I'm still working on that one myself...
Like others have said, Pixologic is great for learning some more basic features from each "Area" of zbrush, But they only get you so far. After that you would want some from eat3d, Gnoman workshop, and Digital Tutors. Those are the best i've seen, personaly. And BTW, At eat3d there are a couple free ones for zbrush if memory serves.
If you dont want to shell out that much, experimenting and playing with zbrush can get you a long way.