First of all, I'm happy with the variety of content in S&P as it is. A free download of this quality is very much appreciated.
In recent months my favorite articles (save from my own!!) have been the Top Ten Games We Want But Can't Get and the recent article on how Mongoose was set up (moreso because it ventured to provide some hard facts about the publishing world, something I'm interested in as a wannabe that wants to become more heavily involved in the gaming industry). I liked these articles because they were interesting for a general reader and were not tied down to a particular game system or mechanic. These kinds of articles are only available in S&P.
So, with that in mind I'd be interested in reading...
Interviews with the staff and writers of Mongoose
Diary of a project
Articles about the gaming industry (origins of Mongoose developed into more specific articles that deal with publishing, advertising, sales)
Reports from gaming groups about their hobby
Photographs would also be welcome (what do you guys look like?)
A more regular feature about historical wargaming (possibly this belongs in the section below on non-Mongoose games...)
Encounters (for D&D or any Mongoose game system: an original encounter that can be slotted into an existing campaign, possibly introducing a new monster type, magical item, prestige class or somesuch).
The following suggestions move away from a Mongoose-only content, so may not be acceptable, but here goes...
Review of a PC / console strategy game or RPG possibly with strategy guide
Something about trading card games (though I seem to be the only one that plays them...or admits to playing them anyway...)
Review of literature (fantasy, sci-fi, historical novels, military history)
That's all I can think of off the top of my head at the moment. I guess any of these things would require more work so to make it clear: if nothing changes about S&P I won't be disappointed.
Cheers,
Eisho