Cyclone III - PLL VCO range ?

You can try with new Quartus II v7.2 that just has been released by Altera. I have tried using ALTPLL megawizard, which allows for generating frequency that can go upto 1300 MHz for input clock frequency of 48 MHz. I don't know how that worked with prior releases since I don't have it installed on my machine. The output frequency will be limited if you are using multiple clock outputs with various settings. If you are using only one input and one output, you should be able to achieve the maximum as is advertised. But if you are using various combinations, then the output options will be limited.