There are now two threads in mud bay to be used for giving/checking positive transaction feedback and for researching bad feedback on sellers/buyers.
http://forum.ih8mud.com/mud-bay-misc...back-here.html
http://forum.ih8mud.com/mud-bay-misc...-feedback.html
The only place you can actually give negative feedback is still by starting a thread in chat. That feedback may be linked in the negative feedback thread so people can find it easily, but there is still no tolerance for negative feedback discussions anywhere but in chat.