They're still in the works. Nothing definitive as far as impending release date. Val was formulating a "buy something from the V-MODA site for $20 and add the XL pads for free" concept for current M-100 owners, but he has yet to make it official (and I don't imagine we'll hear anything more on that front until the pads are actually in production).
On an unrelated note, I've discovered a crack running through the top edge of the plastic surrounding my M-100's left earcup. Considering how delicately I treat them (and how "military-grade" their durability is advertised to be), this was a disappointing and perplexing surprise. I submitted a warranty claim through the V-MODA site on Monday, but no follow-up thus far. It's only been a couple days, so I'm still hopeful I won't have to start pestering V-MODA for a taste of their "Six-Star" support.
I submitted my email on Thursday and didn't get my reply until today. (I know they don't email on weekends) They might be a little busy on the email side of things.