fpgt91

No the abs are not just like the biceps. Can you do 30 reps on your biceps, for one set with a decent weight at least 60% of max rep and do another 30, and then another 30 after that? And then move onto another 2 more excersizes for them after that? I highly doubt it and if you can your not working them out properly.
Your abs are like your calves....they have a very quick recovery rate. Yes they do need time to rest and heal but no where near as much as your other muscles do.
They get replensihed with lots of oxygen rich blood very quickly and probbaly alos have a higher ratio of fast twitch vs. slow twitch muscle fibre in them.
Yes you can most certanly work your abs out everyday but unless your young with age I wouldn't suggest it as you can easily over train your self.
I would suggest working them out every other day. Of course lots of good deep sleep, a good diet and a stress free enviroment will all contribute to a much healthier look and faster recovery times.
A good idea is to work your abs out one day and your calves the other.
Right now I'm seeing excellent results with this routine...

Day 1 Chest, Back, Calves, maintenance on abs (about 1 excersize, three sets)

Day 2 Cardio and Abs

Day 3 Shoulders, traps, Calves, maintenance on abs (about 1 excersize, three sets)

Day 4 Cardio Abs

Day 5 Biceps, Tricepts, Forearms, Cavles, Ab maintenance

Day 6 Cardio Abs

Day 7 Complete day off, rest, lounge, recover just relax

Right now I do not work out my legs as they are getting plenty of use with the cardio, how ever from time to time I will through in a leg routine on one of the cardio days.
Keep in mind though that legs are a huge role in gaining size if that's what your after so of course depending on your goals and genetics to begin with you should more than likely alter the routine to better suit you.