Hi All,
I believe traffic shaping is a very important and powerful feature of ROS but for most of us still full of secrets.
Topics dealing with this are spread all over several forum’s topics and it is hard to distil info needed, extra hard since it is not always clear if the topics really contain useful info.
Grouping these related topics together would be a nice start and invoke more and better focussed discussion to this subject.
Call it “Traffic shaping and Load balancing with ROS”
The Wiki and manual are not giving away all hidden secrets or really useful complicated set ups. It still comes down a lot on the self-investigation of the network operator.
Some of us concentrate on scripting, some on user management, some on routing, some on wireless. But so far I have not seen the QoS been dug out to its extend.
Lots have a say about it but I have the feeling the ones thinking to have discovered the holy grail of perfect QoS are keeping their hard worked for reward a bit to themselves. 
My opinion is that by sharing and commenting each other on this special area of the ROS it could become a traffic shaping platform unlimited in the industry while still reachable for the lesser educated and trained amongst us, and affordable!
I am a small, but growing WISP in a situation many of forum members will recognize. A-symmetrical lines as feed to our network while more and more upload demand has to be met by the users. (Skype, P2P, online backup). This can only be done when a very good traffic shaping process is in place.
I have been playing with it for months and regularly changing because it is still not what I think it should be.
Still too many P2P traffic slips through the filters (L7, P2P standard filter) or the ´all other traffic´ is taking down too much other traffic with it.
The new connection Rate filter in mangle (introduced in ROS 3.30 and 4.x; http://wiki.mikrotik.com/wiki/Connection_Rate ) gives us a new, extra tool in not having the network saturated due some file share UP- and down-loaders or other heavy users.
Since I am still not sure if my previous rules are the best possible an now with the embedding of the new conn-rate I hope we will see a lively discussion on this subject. I hope it will be worth a dedicated forum subject!
Rudy