What is Atmel's 2x5 ICSP connector called?
Those are 0.100", or 2.54mm pitch headers. They are sold in long strips of single or double rows and you can break off however many pins you need. There are also versions with shrouds and various keying mechanisms to prevent backwards connection.

Here's the basic type:



Shrouded types (like starblue mentions in comment) look like this: