Yeah, I was looking for that thread, too. Wonder what happened to it.
Well, there was a thread up about the new flashpoints coming out in 2.3 this summer.
A dev, I believe it was Eric, did respond to that thread. He confirmed that there were going to be multiple flashpoints, that they were brand new (not just new difficulty levels of existing), and that they would be free, no additional cost.
His posts were about 2:15pm EST, the thread was removed around 4:20.
Any chance we can get that confirmation again, or at least another dev statement about the new flashpoints and any associated costs?