The Microsoft SharePoint Products and Technologies Team Blog identified two free SharePoint addons that they recommend.
The one that interest me is Telerik's RadEditor for MOSS. This tool gives you the ability to paste rich text formatted content from Microsoft Word into SharePoint's wikis and blogs. Currently (as with many blog and wiki software) pasting content from Word creates a mess as the software tries to convert the rich text to html. That always bugs me. And I hate having to strip the formatting out using notepad, just to try to re-create it after I paste in the text.