The latest m0n0wall release with the promised traffic shaper update 
(and a few other things as well) is now available for downloading. A 
very basic guide on how to configure ACK prioritization with the new 
version is available at:

http://m0n0.ch/wall/docs/book/view/35

These are the changes in pb24:

- reworked traffic shaper with separate rules, pipes and queues; the 
old configuration is automatically converted to the new model and 
should retain the same behavior, with one exception:

*** IMPORTANT: *** rule processing behavior for the traffic shaper has 
changed: only the action (pipe/queue) of the first rule to match a 
packet will be executed, instead of all rules that match a packet. As 
such, rule order is now important (and may be modified).

- upgraded to IPFW2

- changed behavior of the "add rule" button (+): when clicked next to a 
rule, adds the new rule before the current rule. When clicked at the 
very bottom of the page, appends the rule to the end of the relevant 
interfaces' rule list

- added new field to General setup to allow the webGUI port to be 
specified

- syslogd is no longer bound to the LAN interface's IP address - this 
fixes problems with logging to servers on optional interfaces

- symbols are now allowed in webGUI passwords

- updated ipfilter to 3.4.33pre2

Enjoy,

Manuel