Umm, a month with an R in it, which could be January, February, March, April, September or November.
Not much help there.
Indeed, as nice as it is to get a time frame for when we can expect a gameplay video, "A month with an r in it" really doesn't narrow it dowm much, which is probably why it was worded that way. People wanted a timeframe for when we could expect to see a gameplay video, and we got one, but it's vague enough that it doesn't give us that much of a clear idea, in short, Pete Hines is clever.
I doubt it would be just two slots, though, as multiple implies at least three, probably more.
Even so, that could just mean helmet, armor, and shield, that makes three armor slots. Fallout didn't have shields, after all, but Skyrim obviously will have them.