Root Custom notification bar icons?

[Kitsuii]

I was just wondering if anyone knew of a way to add custom icons to the notification bar like the 'xo' in the following picture?

/img580.imageshack.us/img580/4116/img1167.png (add a www because I'm not allowed to post links, although I've been lurking )

Not to do anything just to for aesthetic purposes, and if so how would I go about doing so

Thanks