Hi Hugh, you have quite a few questions here, but I will try and help.
My workflow for stereoscopic work is based around nuke. Aside from the standard tools, you have the ability to create you own tools in python which is a huge plus depending on what you need done. Also the foundry has some fantastic optical tools that just can not be matched. Ocula will very easily and quickly sort out most visual issues when working with a pair of stereo images.
Within Nuke you have multiple ways of viewing the images. Stacked vertical, side-by-side (horizontal), you can also use the standard Anaglyph (cyan-red) node to work on your desktop screen or use mix nodes to create any other form of color anaglyph very easily. The wealth of nodes in Nuke is why I prefer it. You can very easily split the pair and work in two separate node trees or join the views and work in one node tree. Or using any combination of the two you may need to correct the hero eye. If you are not sure about how great nuke can be for stereo workflows I would suggest giving the guys at the foundry a call for a demo or check FXPHD.com for some really amazing professional training for both nuke and stereo-production.
Generally for an artist seeing their work they have some form of viewing option at their workstation. For example with nuke you can just use simple cyan-red anaglyph, a normal monitor and a set of paper glasses. With an investment you could also use some higher end monitor and equipment (like a DLP HDTV, Zalman 3d Monitor, JVC 3d Monitor etc and a Cinetal Davio box to get the signals to the monitor. Final output and review is always best in a serious stereo viewing suite though.
I named some monitors already and I am sure there are more I do not know about. After the success of avatar I am sure there are more!
As for just your normal everyday work stereo or not, a normal workstation can work fine as long as you have good tools and an artist that knows how to use them and approach working in stereo. I have seen people try and work on stereo pairs as if they were single images and them combine them and pull out their hair wondering why it doesn't work.
Hope this helps.
Cheers,
Chris.
PS - I think one other thing that now sets Nuke apart from the rest of the tools is the Rolling shutter plug-ins as well. Knowing most people are working with stereo and using Reds, its nice to be able to fix rolling shutter and move right into your workflow with out going through a lot of station jumping or program hoping.