Please, if you have a ride to share or want to get a carpool ride to Gintaras, post to the forum page or look for someone to link up with there. Post your flight info here as well!
We suggest coordinating flights and then renting a car at the airport with some other folks, because then you can drive directly instead of coming into the city.
For train, Amtrak goes from Union Station, Chicago to New Buffalo, MI. Trip time is 1 hour 15 minutes, but only goes a few times per day. New Buffalo is only 10 minutes drive away, so easy to pick up from there.
Check for schedules on the Amtrak site: http://tickets.amtrak.com/itd/