In my opinion the BI Documenter 4.0 - is the best!
Try this: http://www.pragmaticworks.com/Products/Business-Intelligence/BIDocumenter/Default.aspx
BI Documenter outputs "MSDN style" SQL Server documentation in either compiled help or HTML format. While documenting all of the major SQL Server components, BI Documenter also documents the entire BI stack, including Analysis Services (SSAS), Integration Services (SSIS), and Reporting Services (SSRS).The unique documentation snapshot feature enables archiving of historical SQL Server documentation sets. New documents can be regenerated at the touch of a button. BI Documenter also allows you to customize the look and feel of your documentation with the ability to add your own branding.
With BI Documenter, you can:
Generate complete SQL documentation at the push of a button
Document SQL Server, Analysis Services, Integration Services and Reporting Services in the same documentation set
Capture metadata snapshots for historical analysis
Output HTML Help (*.chm) or plain HTML
Use either a graphical wizard or command line interface
Document SQL Server 2008!
Tell your own story using the built-in diagramming tool
New Features of BI Documenter:
Object Lineage/Impact Analysis
Snapshot Object filtering
Data Profiling and Recommendations
Diagram Editor Object Properties
Also included are a host of UI and usability enhancements to increase user productivity.
Review Your Solution: page provides a tool tab navigate to key functionality instead of having to click the next button reach those features.
Snapshot Creation: exception link is provided to display a dialog to display any exceptions that were encountered during.
UI look and feel: Updated to coincide with UI look and feel like other product offerings.