Ok, ive seen how powerful Zbrush is, and know how powerful Maya is. But in relation to eachother, what sort of things can you do?

I have a trial version of Zbrush but dont know where to start. Ive found 1 or 2 basic interface tutorials but i want to create characters ready to rig and animate in maya.

Is this possible? Are they created in Maya, then to Zbrush, or are they best created in Zbrush and imported to maya.

Any tips, guides, suggestions. Come on you guys, ive seen some breathtaking sculptures. Dont let me down. hehehe