If Brazil as a whole is not that well served in terms of tourist information (concentrated in the sub-standard page mantained by Embratur), the same thing can’t be said of São Paulo, that has two excellent institutional pages full of information.
The first one is Cidade de São Paulo, mantained by the local authority, and with a version in English. A basic entry point for anyone searching for information on the Brazilian megalopolis. It includes a section with aerial photographs, for those who enjoy that kind of images, and of panoramic photographs as well. As well as a wealth of information organized in different categories, the page includes a download section where tourist can download leaflets in PDF format, including the lovely guide “São Paulo, fique mais um día”.
The second site is Visite São Paulo, with a version in English as well – a page run by a non-profit foundation, São Paulo Convention & Visitors Bureau.
Two excellent resources for anyone looking for information on São Paulo.