Realistically not interested since it's still a hard slog to get business users to use the Net now let alone give them even more options they either don't want to use or know how to use.
Considering the size of my widget trade industry worldwide (3+ Trillion Dollars) only a very small percentage of trade people use any of the facilities already available with, realistically, only one successful, regularly used forum board (not mine!).
My widget trade tend to prefer to still participate in physical exhibitions/fairs where they can actually see the products they are purchasing. These are specialised products and not off-the-shelf, standardised catalogue items.
I have several thousand keywords ranking #1 for many years, way before Googletime, and believe this or not I can go to exhibitions and international companies still have NOT heard of my companies or web sites!
There are many multi million Dollar corporations in my trade that do not even bother with web sites to this day, some still insist upon using faxes rather than e-mail.
If Web 2.0 ever happens in my industry I reckon I'll be well-retired or long gone.