How about a network traffic shaper to control the bandwidth on different applications etc?
I think that it will be very difficult to beat cFosSpeed in this area (they costantly develope it, give almost instant support and every 1-2 weeks there is an update).
Especially now that it costs 9 Euro for lifetime updates and support.
ps. On the other hand it could be a nice idea; a little competition in this area wouldn’t hurt ;D
I have never tried Trustix; but a packet shaper could be built into the Personal Firewall product.