I was also calculating the Darkside's posts, since they just past 100,000 yesterday.
Granted they had over 5,500 posts before a DIS Meet thread can technically open (can't open it until the cruise can be booked per the DIS Board rules. They opened on 1/13/07 but couldn't book until 1/31/07).
Anyhow, they got their 100,000th in about 15.75 months.
Their rate is faster, but with about 17.5 months for us to go, it will be close. We will pick up the pace as we get closer (we were clipping along on KK in the last 2-3 months). Also, we're moving along faster now and they are nearing the 105 and 90 day marks (i.e. all the postings regarding excursions).
Not sure where we'll end, but if we take the 25,000 every 5 months approach, we'd be near 110,000-115,000, given we don't pick up steam in the final few months (which I think we will).
So maybe 125,000 for us?