Would be nice if Bob could post an official farewell online, or at least if CBS-FM could note that Bob is unable to continue his show due to illness and Ron Parker has taken over the slot. No need to go into further detail. But at the end of the day, Bob's privacy needs to be respected and we can only hope for the best regarding his health.
By the way, it looks like Joe Causi has officially taken over at least some of the weekday night slots. Charlie Burger has been on the last three nights, but said that he is filling in for Joe and played his jingle. It's a little odd that someone else would fill in on what appears to be his first "official" week in the slot, but there you have it. Also, Lenny Bloch appears to have taken over weekday overnights - I'm guessing it will be him on Sunday-Thursday nights (Monday-Friday mornings), with Big Jay taking the weekend overnight slots.
Now, the question is... will Joe work six nights a week? If not, I'd rather he continue to host Saturday Night 70's and have someone else do Friday nights, because Joe is really in his element on that show. But we'll see what happens.