Adam,

thanks for that. 
I have had a brief read of it, and it looks really good.

suggestion for your links section;
http://info.iet.unipi.it/~luigi/ip_dummynet/
this is where the traffic shaper code comes from. 

The inclusion of Dummynet (with an easy to use GUI) is one of the reasons i keep following m0n0Wall.

regards
mike