A few posts about Visual, Org Chart, Media, Content Query Web parts
http://www.dotnetmafia.com/blogs/dotnettipoftheday/archive/2009/10/20/introducing-the-visual-web-part-in-sharepoint-2010.aspxhttp://www.helloitsliam.com/archive/2009/10/20/sharepoint-2010-%E2%80%93-create-a-visual-web-part.aspxhttp://www.wictorwilen.se/Post/Visual-Web-Parts-in-SharePoint-2010-cannot-be-Sandboxed.aspxhttp://blogs.technet.com/seanearp/archive/2009/11/17/content-query-web-part-on-sharepoint-2010-supports-multi-value-lookup-fields.aspxhttp://www.chakkaradeep.com/post/SharePoint-2010-Media-Web-Part.aspx