> I *know* it's dangerous. This is on a private, protected machine for 
> my own personal use. How can I allow eval() to run under 
> eRuby/mod_ruby?

You need access to the httpd.conf, so it won't fly on a shared server, 
but:

<IfModule mod_ruby.c>
# other settings
RubySafeLevel 0
</IfModule>

This removes all the tainted security. So beware...
--
David Heinemeier Hansson,
http://www.basecamphq.com/   -- Web-based Project Management
http://www.loudthinking.com/ -- Broadcasting Brain