Well, there's various places you can go for tutorials. The most immediate are the tutorials here (look for the Tutorials link above). There's tuts for Poser (4), 5, and 5 SR-2. Some range from the basic (putting a figure in, adding clothes, textures, etc) the more advanced stuff (the setup room, etc.).

Also, DAZ has some tutorials on their site that might be of interest.

http://arcana.daz3d.com/

And then you can check out RuntimeDNA's tutorials (you'll need to register on the site (it's free) to access them).

http://www.runtimedna.com

And then there's PoserPros. It's essentially a big forum, and I'd suggest registering there as well (free also). Lots of good and helpful things and people to be found.

http://www.poserpros.com

There's others, of course, but these come to mind first.

Oh, and how can I forget 3dcommune? They should have some as well.

http://www.3dcommune.com

Happy posing.