I’m sure by now, the old RaspberryPi is being replaced by the new B+ board RaspberryPi B+ Board and the memory cards have changed from the SD to the microSD (I would recommend the 16GB class 10, since they are cheap now). The new cases are RaspberryPi B+ Clear Case and you will need a heftier power supply (I would recommend the microUSB at least 1.5A or larger.
For those starting from scratch, visit the link below for the starter kit.
Amazon has them RaspberryPi B+ Complete Starter Kit
W5TMP's Blog 