Name Based Virtual Hosting with LTM

Great article, but it's a really old thread, let's see if I can revive it. I'm trying to determine what would be an optimal F5 configuration for a web farm hosting over 50 web sites, all using the same IP but different host headers. To implement failover at the site level would mean creating a separate pool with a custom http monitor for each website in the farm. I need some help implementing proper monitoring and failover for each individual site without having to create so many different F5 pools. I have searched but could not find much, if someone can point me in the right direction it will be greatly appreciated. It wouldn't be such a big deal but we have dozens of such IIS farms, if I would create a separate pool for each site I would end up with thousands of different pools. I'm hoping in the newer LTM versions there may be ways to accomplish something like this. Thank you, Ion