up to date whitelist, or combined whitelist?

Hi, I just saw some post in the archive, and it seems that the 
maintained list is rather old (10 months).

I then wondered if us using greylists has a combined whitelist, which we 
alle can contribute too, and then people can leave out specific 
hosts/subnets they dislike.

Just to get a bigger view on which servers are broken, that one want's 
to receive mail from.

Is there such a list? Or would anybody in case there isn't share any 
whitelists with me?

I can probably host a page with this info, IF people want's to share 
this info?

Sincerely
Max