Finally the rumors turn true. The odd rumors of a strange board that was sighted in the wild over the weekend turns out to be the new Raspberry Pi Model B+. Keeping the same processor and memory configuration for backwards compatibility they have tried to address the specific annoyances in the earlier model. Most of the changes are in the port and IO configuration. Micro SD is a welcome addition with prevalence of high capacity Micro SD cards.

More details after the jump from the Raspberry Foundation.

key improvements:

More GPIO. The GPIO header has grown to 40 pins, while retaining the same pinout for the first 26 pins as the Model B.
More USB. We now have 4 USB 2.0 ports, compared to 2 on the Model B, and better hotplug and overcurrent behaviour.
Micro SD. The old friction-fit SD card socket has been replaced with a much nicer push-push micro SD version.
Lower power consumption. By replacing linear regulators with switching ones we’ve reduced power consumption by between 0.5W and 1W.
Better audio. The audio circuit incorporates a dedicated low-noise power supply.
Neater form factor. We’ve aligned the USB connectors with the board edge, moved composite video onto the 3.5mm jack, and added four squarely-placed mounting holes.

Via – New product launch! Introducing Raspberry Pi Model B+ | Raspberry Pi.