Thanks for the positive feedback. I prefer creating content types with the administration rather than hand coding xml files that represent the site columns and content types.
I'm looking to take the functionality of the tool further to include creating features for site columns and content types. I will also try and make the UI more intuitive. Any feedback is welcome.
Just a quick point ....The SharePoint Solution Generator doesn't work with Portal or Publishing site templates, works fine with WSS site templates. When you use it with lists that support content types you get the association but it doesn't create the content type as a feature.
My SharePoint Blog http://www.davehunter.co.uk