Many veterans of the New York startup world, from venture capitalists to entrepreneurs, write blogs that have become discussion forums in the community. Reading and participating in them is a way to understand what is going on.
NY publications with good coverage of New York news include:
Startup Digest has a curated list of major news, including a New York section.
Startup Genome lets you search for startups, investors, incubators etc.
We Are NY Tech spotlights every day a member of the NY community.