I think there's a missing message here, so I'm answering these
questions:

> But where is ERuby::Compiler defined?  I see the Debian package only
> installed /usr/bin/eruby and no lib file at all.  Is it a 1.7 thing?

When you install eruby from the source, you get a 'eruby.so' shared
ruby library.  Maybe if you do a 'locate eruby.so' you could see if
the Debian package includes it.

[snip]

> Do you mean that if the Page class has a ``foo'' attribute, <% =foo %>
> will be translated into that?

Yes, though I don't guarantee there won't be any bumps.  erb looks
like a really option too.

~ Patrick