Government sites should be entertaining, funny and "cool" and all of the things that draw people in and keep them coming back for more. Use whatever methods work.
Regulation and statistic pages are rather dull. We are being challenged to make our own sites and portals more relevant, inclusive, etc. and we are seeing an increasing movement towards external platforms - Facebook, twitter, .coms, etc.
I say use whatever tools/processes you have at your disposal to make your sites more interesting - innovative youtubes, funny flash demos, etc. Go for it!
I would take it even one step further...if your content isn't engaging and current, and if you aren't leveraging state of the art tools and processes, then your site is already obsolete! 🙂