Web advertisements from Infinity broadcasting are plastered all over the website of trade magazine Advertising Age, and probably many other relevant sites, promoting the lineup that is coming in to take over for Howard.
After ignoring the ad 4 or 5 times, I finally gave in and clicked on it to see if there was any new information, and actually found a pretty cool map on Infinity's website showing which Howard Stern stations are being taken over by whom (whom, right?).
Here's the map:
I guess if the station you currently listen to Howard on is not shown on the map, then you will have to wait and see what your new morning show will bring. For example (as mentioned here last week) if you live in Hartford, you'll be getting Lance. Lance is a reincarnation of The DJ Formerly Known As Sebastian (previously heard on 106.9-WCCC, and more recently 93.7 before they were Hot).