+10 for me as well.
Pages would be an amazing addition. In fact, I use Adobe Fireworks to comp up online advertising. It is so much faster from a workflow than any other app (forget about Photoshop layer comps.). What makes the workflow so good is this:
Pages can be quickly navigated forward and backward with Page Up and Page Down keys
I can place non-animating objects (like branding and key lines) on separate shared layers (this makes it easy to update them once from any given page and have all the changes propagate to the other pages--a real time-saver)
Objects copied from one page could be pasted in identical positions on the canvas (eliminating unintentional animation)
User should be able to duplicate a page
Pages should be resolution independent, making it easy to show how a banner expands to a larger size (please allow pages to align with specific edges of other pages)
Ability to export a PDF document
Ability to export individual pages as individual files so that I can also build a storyboard.
Should be able to copy/paste Individual objects into Flash or be able to export/save as SVG, PNG, JPEG, etc.
Note that this is NOT like Illustrator's canvas model where you can view all the pasteboards simultaneously. I'm not opposed to that, however, I would like the ability to Page Up and Page Down through the document so that I can see the animation unfold. Clients have LOVED the animatics that I create this way.
Bonus points if you can figure out a way to automatically build a storyboard from the pages. I have this functionality mocked up and would be happy to share it with you.