Red Envelope Madness!
There are currently (of that which I've been made aware) over 150 Watch Instant titles that will be expiring between September 3rd & October 1st. The complete list can be found here:Instant Watch Titles that will expire on X date. (May-December, 2008)
Here's the follow-up to that Slate article, with the results of the reader poll:http://www.slate.com/id/2199365/