I just posted instructions on my blog on how to get libical to compile and work under linux with Ruby.
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All the current ical libraries leave something to be desired. libical has all that's needed for ical parsing and generation, and is highly evolved and widely used. So redoing it in Ruby is a big effort, while getting it to work using a ruby extension is pretty easy.
Most of the heavy lifting was done by Rob Kaufman as seen here: http://rubyforge.org/pipermail/rcalendar-devs/2006-October/000050.html. My contribution is making it work and compile under Linux (and probably other POSIX environments).
Now we need an evolved wrapper around it to make it easy to use with ruby. Stay tuned...
Bye,
Guy.
