Update? Not necessarily (and certainly not just for this!), I still
have clients on 1.1.6 and none of my clients are on Rails 2.x yet.
Try these:
<a href="<%= GoogleChart.pie(10,20,40,30).to_url %>">link to chart</a>
<img src="<%= GoogleChart.pie(10,20,40,30).to_url %>" alt="Google pie
chart" />
which should be what you'd get from:
<%= link_to 'link to chart', GoogleChart.pie(10,20,40,30).to_url %>
<%= image_tag GoogleChart.pie(10,20,40,30).to_url, :alt => "Google pie
chart" %>
You could even add the 200x200 size, but that's a frivolous detail
until it works.
The URL works when I paste it into a browser so it should be working.
-Rob