[scrapmami]

When you go to the forum index, all the current monthly challenges with their expiration dates and links to the actual challenge are on the upper right hand corner (like Michelle said). Everything is right there and easy to access, and you can see at a glance what challenges are active. Don't click on the calendar, but click on the challenge link and it will link you to the actual challenge. This is the only site that I've seen that does this, making it really easy to see all the challenges at a glance.