Stampdump.com has a feature to easy advertise your stamps to exchange or swap. You can also publish which stamp you want. Once per week you can create advert which will be on Stampdump's homepage. Here's a quick tutorial.
1. Login into Stampdump.com
2. In profile menu click on >>My Adverts<<
3. At the top click on >>Add new advert<<. If is the button disabled, you have probably added an advert in this week yet.
4. Write what you want to the textarea and choose if it's exchange, buy or sell advert (or combination).
Before you add your first advert, it's good to have your account setup correctly.