Unfortunately, the new schedule does not include any extra weekend service. Metra offered 16 trains a day and is now up to 30 during the week. Click the link for an online schedule (will open a new window with the Orland Park stop at 143rd as an example).
The new lines will start January 30, 2006, and offer addtional service to Manhattan and New Lenox. Although many southwest Chicago suburbs were hoping for additional weekend service, a Metra spokesman said the budget for this expansion left nothing for the weekends.
It's too bad as I live about 2 blocks from a brand new Metra station. Although I don't work downtown it would be nice to be able to jump on the train for a weekend event instead of having to drive and park. I guess that is something to hopefully look forward to in the future.