Hey Mirek,
to answer your first question,
There are about 3 or 4 ways of showing 3d.

One is interlaced where each row of pixels displays either the left or right image and cycles between them.

The second type is Page Flipping which alternately shows left and right images and the glasses block out either one of yor eyes so you only see the right image with your right eye so on.

Theres Classic Red/Blue anaglyph 3D like in old comics and movies

And then there is polarized which i don't really know how to do.

I think that 3D is making a comeback with new technologies like REAL D and stuff. James Cameron is really getting into it and about 5 new 3D movies are being released by 2009.

I dunno...

Also, i have decided the Pencil Cannon will be my next 3D model i make.