WEB Parts in Asp.Net 4.0

Complete Thery on webparts
http://www.simple-talk.com/dotnet/asp.net/web-parts-in-asp.net-2.0/
http://www.informit.com/articles/article.aspx?p=703789&seqNum=2

Webpart Propeties like Height, Width, themes, color
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http://asp-net-example.blogspot.com/2010/06/how-to-set-change-webpartzone.html
Creating Simple Webparts

http://shalvinpd.blogspot.com/2008_05_01_archive.html

http://msdn.microsoft.com/en-us/library/sk23dydw.aspx#Y5087

Drag from one Zone to another
http://www.c-sharpcorner.com/UploadFile/mosessaur/webpartspage01102006193824PM/webpartspage.aspx?ArticleID=ca9c121b-c594-4c50-a232-3c7d77ec9d4d

A good Tutorial on Webparts

http://www.beansoftware.com/ASP.NET-Tutorials/Web-Parts.aspx
http://waitink.blogspot.com/2008/06/aspnet-ajax-and-web-parts.html

Ajax Example on Webparts
http://waitink.blogspot.com/2008/06/ajax-web-parts-part-1-drag-and-drop.html

Creating IGOOGLE Website
http://www.codeproject.com/KB/ajax/MakingGoogleIG.aspx 

Webpart Personalization
http://msdn.microsoft.com/en-us/library/879kf95c.aspx ----->creates a website
http://msdn.microsoft.com/en-us/magazine/cc300767.aspx#S1

Themes on Webparts
http://live.mscommunity.net/blogs/borissevo/archive/2007/10/04/rounded-corners-for-web-parts-in-asp-net-2-0.aspx