SSIS Doucmenter integrates into the SQL Server 2005 Business Intelligence Studio. Once you have installed SSIS Documenter you will see a "Generate Documentation" menu item availabel for all SSIS packages. Generated documentation is created under the same solution, and can be deployed to the web server.
There is a command line utility called SsisDoc.exe, wich allows you to automate documentation generation process. Although it is not necessary you may want to add SSIS Documenter installation folder to the %PATH% environemtn variable, to have this tool availabel at all locations.
Command line interface allows you to integrate SSIS docuemnter with the various build and continuous integration environments. You just need to provide locations of the SSIS packages and destination location for the documentation and the SSIS documentation will be always available for your team.