I have been working on a SharePoint 2010 MySite implementation and wanted to do something that I thought would be fairly simple which was adding a Content Editor Web Part to the page.  When I went to add the web part I noticed it did not show up in the gallery.  I figured it must be because of the template being used for MySite and that a particular feature was not activated so I started activating a bunch of Features until it became available.  The feature that made this and a few other web parts such as the Image Viewer and Page Viewer web parts available was the SharePoint Server Publishing Infrustructure however this makes a bunch of other stuff available and so I wanted to know if there was something else I could do.  A person from Microsoft Consulting Services (MCS) helped me with this and mentioned that you can turn on a hidden feature called "BasicWebParts" that enables this feature.  I activate this as part of a Feature Receiver on the site and voila I now have access to those web parts.