In this article you can read about how you can disable inserting Web Parts in the SharePoint 2010 Rich Text Editor.

An independent product directory that provides SharePoint power users, developers and administrators with objective reviews and opinions on SharePoint Web parts, applications and development platforms. Includes searchable product listings, ratings, browsing by categories, vendors, platforms and other parameters.

• Show/Hide Multiple Web Parts
  A tutorial on how to to create a view/web part toggle menu in SharePoint
• Custom Field – Upload Files and Images
  Integrate an upload-field in your lists and libraries
• Controlling Single Web Parts with CSS
  How to style web parts with CSS
• Editing Themes with SharePoint Designer
  Exactly what the title says
• Common Date Time formulas for Sharepoint – Calculated Fields
  Formula examples to calculate date and time in calculated fields

Besides these links, some interesting articles were also published recently:

• Using SharePoint In A Regulated Environment
  Using SharePoint in the Life Sciences industry
• Enterprise 2.0 mit SharePoint
  A quick overview of available Enterprise 2.0-oriented SharePoint extensions
• How to give the human touch to SharePoint
  Tips on bringing people and SharePoint together

• Evaluating SharePoint for Larger Enterprises [Link]
• Roles & Responsibilities for SharePoint Implementations [Link]
• Display Web Parts with Tabbed Navigation [Link]