Although it hasn't happened on every character I have played in the Beta (Patch 14,15,16) but on at least half of my characters, I have hit another rare item within minutes of my second play through after beating the SK. Is this just my MF doing me good (although at the end of my first playthrough, I'm usually only around 10-15% MF)? Anyone else have this happen regularly? After that quick rare, then it's back to MAYBE finding another rare with that character every 10th-ish playthrough...if even that.
I have not experienced anything like this. I think you just got lucky. I can count on my fingers the number of rares I've received, since I received a beta invite, that were not dropped by the skeleton king.
It's always exciting to get a random non-SK rare, but so far none of them (3-4 in all the time I've been playing which is from the beginning) has been actually worth writing home to mom about. The initial excitement wears off when the stats aren't wowwee. Still, it's so cool to see it drop. That's the Diablo fever after all, isn't it?