Ruby help needed for PGCon

I am looking for a volunteer to help with a Ruby problem. PGCon (a
PostgreSQL conference) has been using Pentabarf (conference planning
software) for a number of years. We recently upgraded various Ruby
components and now we cannot get Pentabarf to run again. The Pentabarf
project is basically dead (lead developer is absent, mailing list is
silent), so we are seeking help from the Ruby community.

If you’d like to help us out, both PGCon and myself will greatly
appreciate your help.

Thank you.

For starters, we are having trouble starting mongrel:

/usr/local/etc/rc.d/mongrel start

Invalid gemspec in
[/usr/local/lib/ruby/gems/1.8/specifications/rack-cache-1.0.3.gemspec]:
invalid date format in specification: “2011-08-27 00:00:00.000000000Z”
Invalid gemspec in
[/usr/local/lib/ruby/gems/1.8/specifications/tilt-1.3.3.gemspec]:
invalid date format in specification: “2011-08-25 00:00:00.000000000Z”
NOTE: Gem::SourceIndex.from_installed_gems is deprecated with no
replacement. It will be removed on or after 2011-10-01.
Gem::SourceIndex.from_installed_gems called from
/usr/local/lib/ruby/gems/1.8/gems/gem_plugin-0.2.3/lib/gem_plugin.rb:109.
NOTE: from_installed_gems(arg) is deprecated. From
/usr/local/lib/ruby/site_ruby/1.8/rubygems/deprecate.rb:62:in `send’
NOTE: Gem::SourceIndex.from_gems_in is deprecated with no replacement.
It will be removed on or after 2011-10-01.
Gem::SourceIndex.from_gems_in called from
/usr/local/lib/ruby/site_ruby/1.8/rubygems/source_index.rb:50.
NOTE: Gem::SourceIndex#initialize is deprecated with no replacement. It
will be removed on or after 2011-11-01.
Gem::SourceIndex#initialize called from
/usr/local/lib/ruby/site_ruby/1.8/rubygems/source_index.rb:67.