Raspberry Pi has introduced a new model. The Model B has been selling for over 2 years, but many were waiting for an upgraded version with slightly more features. The new Raspberry Pi Model B+ has four USB 2.0 ports instead of two, a microSD card slot, BCM2835 application processor and 512MB RAM.
Purchasing a Model B+ won't burn a hole through your pocket, just like the Model B. It costs just $35.