Ruby is up to 1.8.4, and an ipk file for rubygems would be handy.
I try a manual installation of RubyGems, and I get a string of errors.
The most interesting one seems to be:
/opt/QtPalmtop/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:29: in `require': libcrypto.so.0.9.6: cannot load shared object file: No such file or directory - /opt/QtPalmtop/lib/ruby/1.8/arm-linux/digest/md5.so (LoadError)
I'm going to check with the ruby-talk mailing list.. maybe I can solve the install problem.