The Ask.com web site has an article on philatelic literature – Stamp Insider is a Fine Philatelic Publication by John Finch which publicizes the digital publication Stamp Insider.
If you haven’t checked out Stamp Insider yet, do it now. This is simply a good stamp club publication, covering a broad range of topics from eBay to youth philately to deltiology to patriotic covers and on and on. It is produced by the members of the Federation of N.Y. Philatelic Societies, Inc. Al Starkweather is editor. It is an entirely digital publication: there’s no print version.