A good idea IMO but with caveats.
I may be cynical but I do wonder how many people are willing to give out their suppliers to their competitors. Though this site does seem to be more forthcoming in that regard than many.
You would need to only allow pre-trusted members to enter details. Otherwise you'll have every scam artist and his dog posting details of their 'company'. Although you may have a 0% trust of that member, the database may soon fill up with spam.
You'll need something like the amazon review summary, using your trust level as the weight before taking the average.
AVG( SUM( their_trust * your_trust )) ? or something along those lines. Okay, okay, syntactically wrong but you get the idea.
