Limit the postings to open-pollinated or heirloom seeds that you have grown and saved and are offering for trade to others. This is also a great place to list varieties that you are seeking. What you want to trade for - List the seeds that you are looking for. The short answer is yes. Since this service was added as a mechanism for building a stronger seed saver community, as well as to relieve a bit of pressure from our already stretched resources, we can't act as intermediaries.
Email is the required communication method.
If you are new to forums and swap boards and are worried about posting your email address, it is common to get a free email account. Some of the most popular providers are Yahoo, Hotmail, and Juno. You will then see message telling you that your entry was added to the list. You will probably need to click your browser's refresh or reload button to see the new listing.