I believe all three American Airlines wholly owned regional have cadet programs, I know PSA does for sure, since I work there. More info on that is here.

While the current state of the WO'd regionals is well documented and debated here, I personally believe that going forward there will be some long term benefit at being at a wholly owned carrier. In the words of AA's CEO, placing flying at a WO means they're not paying someone else a profit margin.

That being said, I do agree that there is much benefit to not tying yourself to a specific employer before you're on property, but one does have to weigh that against their current situation.

Here's the most important question right now though: where do you live, or where do you want to live?