You can grab it here.
This is obviously a beta, so there are a few rough edges here and there that we are working on. If you have how-to or general questions, please go to the forums at http://msdn.com/xna/forums/. If you find a bug or would like to make a suggestion, please go to our Connect Web: https://connect.microsoft.com/site/sitehome.aspx?SiteID=226. After you sign in with your Windows Live ID, click on Feedback. From there, you can choose to file a bug or offer a suggestion for XNA Game Studio Express and/or the XNA Framework.
I'm working on the recording of the component demos and that tutorial. More later!