The Raspberry Pi Model B+ Features
 

• Model B+ Raspberry Pi with Mounting Points and 512MB RAM

• Broadcom BCM2835 ARM11 700Mhz 

• Integrated Videocore 4 Graphics GPU capable of playing Full 1080p HD Video

• 4 x USB Ports (Max Output 1.2A)

• Board Power Draw: 600mA

• HDMI Video Output

• 4 Pole Stereo & Composite Video Output

• 10/100Mb Ethernet Port for Internet Access

• 5V 2A Micro USB Power Input Jack

• MicroSD Flash Memory Card Slot

• 40-pin 2.54mm Header Expansion Slot (Which allow for peripherals and expansion boards)

• Dimensions 85 x 56 x 17mm

 
Improvements over the Model B:

• 40 Pin GPIO

• 4 x USB Ports with improved power regulation

• You can now provide up to 1.2 AMP to the 4 USB ports 

• 4 Pole Stereo & Composite Video Output

• Revised Layout

• Micro SD Port

• The B+ board now uses less power (600mA)

 

This is the original Made in U.K version.
 
The team at Adafruit have come up with a nice introduction on the Raspberry Pi Model B+ here: https://learn.adafruit.com/introducing-the-raspberry-pi-model-b-plus-plus-differences-vs-model-b?view=all
 
Note: The latest Raspbian Wheezy version (20th June) may not work directly out of the box on the Raspberry Pi Model B+ as it requires an updated Kernel/firmware. During our tests, booting failed multiple times and then later booted up.
If you are a newbie, or don't already have the older Model B, we'd recommend you purchase a pre-installed Micro SD card that's been upgraded with the latest firmware/kernel and tested on the Raspberry Pi Model B+.