Deitel & Associates, well known for their technical books (and coincidentally a local Maynard, MA based company,) have just published a great Silverlight Resource Center containing guides to learning Silverlight:

Silverlight Resource Center
http://www.deitel.com/ResourceCenters/Programming/Silverlight/tabid/2157/Default.aspx

The Deitel site hosts a wealth of information in other Resource Centers that I encourage you to check out.  For example:

-Chris