I'm pretty new to SharePoint, so please forgive me if I have missed
something obvious.

Suppose I have a Document Library ("Project Reviews"). I have a template
document that includes review "dimensions" and "criteria". I have columns
in the DL list for various attributes ("Status", "Completion Date",
"Participants") that might be important for grouping. So far so good.

I would like to associate other information with each project review (for
example, project plans, documentation of deliverables, contact information).
It seems that a Document Workspace would be a good way to do that...

EXCEPT...

That the DL list doesn't give any way to go from a document to its document
workspace. So I can use a filter in the DL list to pick out all project
reviews for projects completed in 2006, but I can't use that list to "drill
down" to the associated Document Workspaces.

Of course, I can find the workspaces in the Workspace list, but I can't
filter that list based on criteria in the Project Review document library.

Suggestions?