How did Google come to this decision?
Google explained their decision as following: " We launched iGoogle in 2005 before anyone could fully imagine the ways that today's web and mobile apps would put personalized, real-time information at your fingertips. With modern apps that run on platforms like Chrome and Android, the need for something like iGoogle has eroded over time, so we’ll be winding down iGoogle on November 1, 2013, giving you a full 16 months to adjust or easily export your iGoogle data."
What will happen with our personal data stored on iGoogle's gadgets?
Google will not erase the data stored in the gadgets and will make them still accessible for you via other Google products linked with your account (Gmail, Google Docs, Google Finance, Google Calendar and other).
At the moment, 7.1 million people use iGoogle and for 6.5 million of them it represents the homepage. This means lose of interest?