What happens after a request is accepted? You must have a list of accepted figure requests to last a number of life times!
Each request is noted down, and the votes and added as they come in. The more votes something has, the higher up the list it goes. The ones at the top of the list are then more likely to become reality when we're considering new ranges / sculpts.
The current Top 10 is here: http://www.pendrakenforum.co.uk/index.php/topic,3216.0.html
, but I'll be updating that pretty soon.