If you're going to CAST, you're likely to fly in and out of the Grand Rapids "Gerald R. Ford International" Airport. (Hey, it's international, we fly to Canada and stuff.)
The Airport's website has a Parking Lot Fee Calculator ... and it's buggy.
Want to practice your testing skills on it? It's free -
http://www.grr.org/ParkCalc.php.
What bugs can you find? Feel free to leave them as comments, or, if you're really ambitious, make your own blog post and leave comments pointing to your blog.
Also - check back here later today. Big, Big Announcement to come.