There are several reasons why you probably do not want to share too many aspects of your life with Google: It has a near monopoly in several aspects of the Internet, and has its hands in many others: search, advertisement, calendaring, cloud storage, social media, news, e-mail, maps, online office …
This site lists competition. And by using several of these, you give Google the chance to gain new insights about you by combining data from several services.
Announcing Vyew 2.0: Free Web Conferencing and Always-On Collaboration * 100% Browser-based - No downloads or installs * Shared viewing of: DOCs, PPTs, XLSs, JPGs, PDFs and more * Real-time Desktop Sharing and Screen Capturing * Tools to Whiteboard, Draw
Announcing Vyew 2.0: Free Web Conferencing and Always-On Collaboration * 100% Browser-based - No downloads or installs * Shared viewing of: DOCs, PPTs, XLSs, JPGs, PDFs and more * Real-time Desktop Sharing and Screen Capturing * Tools to Whiteboard, Draw