Most AGR positions ARE bonus eligible. That means about 125k at the O-5 level, 110-115 as an O-4 (not counting tax advantages, etc etc) which is much better than some of the post giveback pay rates for guys who are at struggling carriers.
We have 2 f-lo'd UAL guys in my unit, both of who got the full bonus. There may be state/unit restrictions on which positions are bonus eligible, but my understanding is that if you meet the gate requirements you are good to go. I'm pretty darn happy playing part time fighter pilot/part time airline guy, but there is a very good case for going back full time if/when you get the chance if you are reasonable close to an active retirement.
For you guys furloughed or now at the bottom of a list, I predict you'll look back years from now and be glad at how it all worked out. As mentioned--you keep your seniority AND get an AD retirement. You don't have to be furloughed to do this...some guys at FDX have left and gone back and done the same thing.
Best source of good info is your state ANG bureau.