You could do 60+ segments within a continent but you would have to pay $US100 in economy class for each segment above the 4-6 allowed in the standard RTW fare. So at an extra $US6000 you'd be better off buying another RTW ticket in 1st Class and qualify for Platinum/Executive Platinum on miles/points.
And you can't do this in your continent of origin as you can't buy extra segments there.
110000 miles is about the maximum you can fly on a 6 continent fare although the maximum I've ever had ticketed is about 85000 miles.
[This message has been edited by 3544quebec (edited 02-20-2001).]