I was a grad student at Churchill, and we mostly ignored such things, but my girlfriend was an undergrad and felt compelled to educate me. I recall Johns being the rich kids, Peterhouse was the gay men (not sure if that's for an actual reason or just the obvious pun), and a couple others that I can't remember off the top of my head.
I thought Homerton was the obvious gay pun?
And one thing that IS reasonably accurate: New Hall is a female version of Hufflepuff. It is most of the time filled up by the "leftovers" (pooled there)...
(The HPMOR discussion thread after this one is here.)
The previous thread is over the 500-comment threshold, so let's start a new Harry Potter and the Methods of Rationality discussion thread. This is the place to discuss Eliezer Yudkowsky's Harry Potter fanfic and anything related to it. The latest chapter as of 09/09/2011 is Ch. 77.
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: one, two, three, four, five, six, seven, eight. The fanfiction.net author page is the central location for information about updates and links to HPMOR-related goodies, and AdeleneDawner has kept an archive of Author's Notes.
As a reminder, it's often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: