A simple example of jqgrid 4.0 + jquery 1.6 (adapted from the "Loading Data" -> "Load once" demo page).
To run it yourself, you'll need ruby and bundler.
Install bundler if you don't have it.
gem install bundler
Clone, bundle, and run sinatra.
git clone https://github.com/searls/jqgrid-example.git && cd jqgrid-example && bundle install && bundle exec ruby sinatra.rb