I'm not sure if there's a thread about this yet. The title says it all! Anything you want to advertise just post it here.^^;;
Here's my advertisement:
NEW Group! click here: http://groups.minitokyo.net/celestia - join if you are interested and if
you use celestial backgrounds in your wallpapers!^_^
[edit]
It should be a working link.^^;; So that if I have time, I may visit your site and if you want, I can review it.^^;;
[/edit]