It seens that as of July 25,2013, when you download the sample code for LaunchPad on the LaunchPad home page, under topic Code examples/Snippets(http://processors.wiki.ti.com/index.php/MSP430_LaunchPad_(MSP-EXP430G2), the code labeled MSP430G2xx3 doesn't download code written for the MSP430G2553. Instead it downloads code for MSP430G20x3. For some of the simpler sample codes, the code will run but for more complicated examples like SPI, the code will not compile. I had to search for an unmodified version which I provided for my students.