Great call Michelle, I haven't tried XMLmind in a long time.
On a related note, just last night I was struck by the fact that NetBeans now supports just about every language under the sun... why not DocBook? A little while later I found this: http://blogs.sun.com/geertjan/entry/update_center_for_netbeans_contrib By adding the contrib update center noted in the link above you can install DocBook/XML editing capabilities into NetBeans, create DocBook/XML projects, etc. I still prefer 'vi' for some strange reason, but its great to have cross platform options. I'm sure using the SolBook DTD would be pretty straight forward. benr.
