Dell has the Belkin USB Charging 6-Outlet Surge Protector for $9.99. It also ships for free from Dell.

This is the lowest price it has ever been (well tied with a previous offer).

Product Features

• 900 Joule energy rating provides superior power protection for all your sensitive home office devices
• Wall-Mountable for extra outlets without extra cords
• 2 USB Ports (1.6A) offer one-source charging for USB-enabled devices
• Surge Protection Indicator lets you know your equipment is secure and protected
• Not-Grounded Indicator warns you when your outlet is not properly grounded
  Oversized Metal Oxide Varistors (MOVs) absorb excess electricity for increased protection
• Damage-Resistant Housing protects circuits from fire, impact, or rust, and prevents dents and scratches
• Lifetime Product Warranty