Booting Up: Weekend Edition.

Internal emails reveal how Google made Android work. [NYT]

Gilt raises $138 million, Softbank among the investors. [ATD]

Angry Birds maker Rovio wants an IPO. [Reuters]

AOL strives to be relevant in the age of Gchat. [NYT]

Apple now the world’s most profitable brand. [Reuters]

Booting Up: Weekend Edition.