I've been away from this forum for quite some time, busy with life and such. In fact only recently completed all the Skyrim DLC.

I was wondering, since this thread - http://www.gamesas.com/topic/1249697-on-boethiahs-summoning-day/, Has there been many more like it? I can't search for what would obviously be a very unique post.

Also, on a side note, is the lore in ES online compelling enough that you would recommend experiencing it myself or would you recommend I read some broad strokes?

There have been a few of those threads, always with subtle differences. In one instance, it started out as the original and then was slowly edited.

There is a lot of debate here about ESO, but personally the lore it expands upon and introduces is fantastic. In terms of lore, it's has the opportunity to show us many provinces, and does a good job with all of them. (Note; I have yet to play the AD so I'm assuming this carries over to them).

I'm not sure if you are specifically asking about On Boethiah's summoning day threads, or just good apocrypha in general. Chimere has posted an OBSD thread every year for the past three years, each subtly different. Just search his username to find the rest. If you're looking for apocrypha, Nighthawks has the most complete collection of links I've seen http://www.pearltrees.com/nighthawker/apocrypha-writing/id9082366 (Thawks, you are awesome!)

In my opinion, the ESO lore is fantastic. The influx of new books has been pretty impressive, though I can't speak too much for quests and plots. I'm less enthused about the super-gougey price - I'm planning on holding out to play Din's copy instead.