[texhax] More Beamer questions

[Tom Backer Johnsen]

I am beginning to get the hang of Beamer for a course that starts in a 
three weeks time, but there are (of course) a huge number of thisng to 
learn.  Here are a few:

There are a few elements in most or all of the themes for Beamer which 
I would like to eliminate from the slides.  First, if you have defined 
an author and a title for the presentation, these elements always 
appear at the top of the sidebars.  I would prefer to have this 
information on the first frame, using \maketitle.  That would save 
valuable real estate.  Is it possible to use some option like 
"\noauthor" somewhere?

The other thing which I would like to eliminate is the faint 
navigation things close to the lower right corner.  Is it possible to 
supress this part of the slide?

Tom