I would assume this would only work if you are offering something in exchange for draft picks.
What if one of the teams doesn't have the pick you are asking for? I guess the AI could skip them when sending offers.
So, I'm offering player X for a 2nd round pick. Instead of posting in the trade forum, I send out an offer to all teams, and the first one to accept gets the player.
Is that how you envision it working?