RE: examples of sites with good accessibility

And did you test with assistive technology?  Some of the headings aren't
showing up for my screen reader.  I do not know whether this is the result
of something defined in a style somewhere, a bug in the way the screen
reader handles the content, or something else.
 
The use of a list here is a good example of the trend to use lists as a
catch-all solution.  This is made more unclear because, as I said, the
headings are not displayed as part of the content by my screen reader.
 
<div id="breadcrumbs"> 
  <h1>You are in .</h1>
  <ul>
    <li class="home"><a title="Transport for London"
href="http://www.tfl.gov.uk" <http://www.tfl.gov.uk> >Transport for
London</a></li>
    <li class="current"><span>Current section</span></li>
  </ul>
</div>

One of the definitions of list is:
The property possessed by a line or surface that departs from the vertical
 
 
the following heading is the only heading I can recognize in the rendered
version: 
<h1>Please select from the options below before proceeding.</h1>
 
Maybe I'm out of the loop on the current practices with regard to Title and
Alt atributes, but is there any reason why you use both?  Unless you know
how assistive technologies handle these attributes you run the risk of
possibly conveying an unintended meaning.  This is further complicated by
the fact that assistive technology is apparently electing to handle Alt and
Title in whatever way they think best.