Susan, here's some more coverage:

Eastern Europe - EUROX (and others)  

Latin America - GML  

Middle East/Africa - GAF

SE Asia -  THD, IF

Frankly, with all these ways to access the markets, FRN doesn't seem like such a great new opportunity--unless you can't find enough volatility anywhere else.  ;-) 

In my limited experience, EUROX has been most steady, THD and IF have been most unsteady.

--AAlan