I used Pinterest to log my haves and wants directly from the database here.
Here's how:
Join pinterest, it's free.
they'll explain how to pin from any webpage.
Look up your plant in the database here.
"Pin it" (explained in the pinterest signup)
Put its name in the description box and say if you have plants of it, seeds, bulbs, etc.
Then post a link to it in this or any other forum over here like this:
http://pinterest.com/critterga...
http://pinterest.com/critterga...
This site will have its own trading system soon.
Until then, I'm real happy with my method.