I have referred to this site in previous posts, but I have been remiss in providing it with the credit it deserves. Postscapes is probably the most reliable and comprehensive guides to the Internet of Things landscape, covering news, companies, and events. For anyone interested in sourcing a supplier, or getting some guidance, this is an essential stop. The open-source / maker space is well covered, including Arduino, Raspberry Pi and crowdfunded projects, and applications are categorised into body (i.e. health), smart homes, smart cities and industrial applications.
Of immediate value to any newcomer, as well a reminder to old hands are its handbooks – summaries of definitions, investments, market sizes and links. Of topical interest given the recent announcement of the Wireless IoT Forum is a guide to standards and technologies.