Add progress bar and last updated details to checklist form

It sure would.
Here is a simple one for Drupal 7.

Thanks, guys. This will now be handled by the Checklist API, where it's already on the roadmap. What I need to move forward on it is a design. Please look at the updated interface and supply a mockup if you have ideas. It needs to work with the new "Show/Hide descriptions" link. I'd like to add "Last updated time" and "Last updated by", as well. Thanks!

What would everyone think of something like this?

Great idea! And I like the implementation.

I think the progress % needs to be positioned right below the progress line. Something like this;

|-------------------------|-----------------|
_______________________17 of 25 (68%)_____________

Move "last updated" down a line or two to accomodate it.

Thanks, @Ben Finklea. That's the core progress bar "widget". The positioning is built in: message on the left and percentage on the right. After considering it a while, I've decide to commit it as is, because using the core pattern and styles will make it more likely to be compatible with other themes (I have mobile in mind, too). It's in the dev release. Thanks, everyone!

+1 to @frazras! Happy to have your participation. :)

The update is in the new beta.