what are the best tutorial website for getting basic information about Silverlight?
See links in the Silverlight Wikipedia entry, for example, MSDN links page or this MSDN introduction.
For daily tips check silverlightcream.com. You can usually find a mix of beginning and advanced info there.
I second SilverlightCream.com.
Also, Pete Brown and Tim Heuer write a lot of Silverlight, tutorial-oriented blog posts.
Silverlight Tip of the Day as well.
I agree with SilverlightCream.com. If you follow that you'll stay up-to-date with everything.
For a lot of video tutorials, you should do a search for Silverlight on Microsoft Showcase.
Another great site I would like to mention is SilverZine.Com. Great source for in depth tutorials.
Next, one great blog to follow for tutorials and information in Jesse Liberty's blog.
Last by not least, I would like to use this opportunity to shamelessly promote my own blog a little. I write a lot of small tips&tricks and longer tutorials about Silverlight, Blend and WPF.