According to Harrison's blog, Frank will be joining him (Chris H.) on the ATFR show on Monday to talk about when he and Nicole broke up, the status of their relationship when filming started, etc. Odd that it was worded as Frank would be joining him.
Of course, this is in direct conflict to the information that Frank didn't go. We know Harrison blogs in advance, so maybe they just are carrying on the charade of Frank appears. Strange, regardless.