I got kinda tired of hearing Die Human, Die! all the time so Ive turned the sound off. But that didn't help much; Skynet has replaced all the ads on my K5 with directions to abortion clinics, assisted suicide centers, and recipes for home-made poisons. I'm thinking about downgrading the firmware, but I'm not sure I will. If you saw the color E-ink screen you'd understand.
Seriously, though, there is an update for the Kindle Touch. It's not available direct from the device, so if you want it you will need to download it to your computer and transfer it over USB.
You can find the update file here. After you transfer it to your K5, you'll be able to initiate the update from the settings menu (Menu, Settings, Menu, Update Your Kindle).
I've already installed it, and I cannot see any major changes. I also checked to see if the Manage My Kindle page on Amazon gave nay hints bout new abilities, but that was a bust.