Hello,
If you want free marketing ideas then look at the top 100 websites in the world and use their traffic to help you. For example:
Youtube: Make a video about your GDI and WS domain name.
Facebook: Make a fan page about your WS domain name.
Forums: Some forums allows links in signatures, make sure your WS domain name is there
Email: Make sure you have your WS domain in your own email signature (this works well!)
Autoreply: Set up an autoreply to any emails you get, saying you will get back to them and mention your WS domain.
Digg it: Digg your WS domain name
Stumbleupon: Stuble your WS domain name
There is a stack of free traffic out there if you just think about it. I have a good GDI downline in just a few weeks of joining so just start shouting your message about your domain name!