iPhone becomes #1 Flickr camera, iTunes 69% of music sales, Tom Tom iPhone GPS, Quake Live, and more. Picks of the week: Alex Lindsay: Tom Tom, Turn-by-turn navigation for iPhone - $99.99 for US & Canada; Western Europe and Australia map versions also available Andy Ihnatko: Default Folder X - $34.95 Merlin Mann: Pocket God, game for iPhone - $0.99 Leo Laporte: Mint.com Personal finance iPhone app - Free