Heh heh heh... I was just thinking about compiling a list like this for
this site...
Batgirl Bat-Trap is one of the elder statesmen of this department, boasting a truly
massive story archive plus lots of behind-the-scenes stuff from the actual show you'll find on virtually no other website. Updates have slowed down since this year began, but it's still a decent resource.
Superstories was my original entry point into the genre, and while there's precious little on it I'd reread in this day and age, I'll also admit I probably haven't scratched a tenth of the stuff on it. Nowadays the Admin seems to have abandoned it entirely and left it to Addventurers, but the old site is something well worth preserving and introducing to a new generation.
Totally shameless (semi-)self promotion:
Dark One's blog has all kinds of fun stuff for people into the rougher side of SHiP. Right now it's mostly original creations and Mr. X stuff, but he has done some stories with mainstream comics heroines, and I'm working on republishing a collection of those later this year.
Claremindcontrol hasn't updated in years, but it's a pretty good read for anyone into bondage and mind-control who wants to see a professional, critically-acclaimed writer indulging in the same.
... which segues into my last rec, which is mostly for hardcore comics wonks (or those looking to become one).
Supermegamonkey is your one-stop shop for summaries and commentary on every Marvel comic from
Fantastic Four #1 all the way into the mid-90s, and it's
still ongoing. His activity's tapered off a bit recently, since by his own admission he finds very little from the 90s to be charming, but its sheer breadth makes it a premier research resource for any SHiP writer with a big thing for faithfulness to source material.
Obviously, it's not
devoted to peril, but he's certainly not too high-minded
to comment on it when it shows up...