It's located at http://www.play-creator.com
It's (naturally!) 100% free, and requires no software installed (except for the Flash Player, but I can't imagine anyone not having that).
It also interfaces with phpBB boards, so you can share your play with other coaches without having to bother with screen-shots, uploading and such hassle.
A quick overview:

And a closer look at the main screen:

(downsized for filesize reasons)
Cyanide (makers of the upcoming Blood Bowl PC game) have adopted it into their board, so you can see the phpBB integration by going here: http://www.cyanide-studio.com/forumBB/v ... ?f=4&t=308