Some resources for quick developer start!

http://www.windowsazure.com/en-us/develop/overview/
(Developer Start)

http://www.windowsazure.com/en-us/develop/downloads/
(Download tools) 

http://www.microsoft.com/en-us/download/details.aspx?id=8396
(Training Kit 356 MB)

http://www.microsoft.com/en-us/download/details.aspx?id=24398
(SharePoint & Azure Development Kit)

http://msdn.microsoft.com/en-us/magazine/gg490352.aspx
(Some Development Resources)

http://msdn.microsoft.com/en-us/magazine/ee336122.aspx
(App Development Tutorial)

http://msdn.microsoft.com/en-us/library/windowsazure/hh771389.aspx
(Troubleshooting guidelines)