In this gallery of most appealing young lady seiyuu, you are sure to find something of interest whilst furthering your knowledge of the profession at the same time. The question asked on the Vipper threads was whether seiyuu are lately getting cuter; perhaps only reference to the images can resolve this.
It might be said, if you will excuse the lack of charity in so doing, that some of these idol seiyuu look to owe as much to the marvels of photoshop as to any objective increase in beauty. Though in this they hardly differ from pure idols.
The second seiyuu gallery may be of interest.