Any websites that use custom altered colors in the icons for facebook, twitter, myspace, etc.?

In other words: say a site has a strong red color theme. And they have icons for twitter, facebook, myspace, etc. in their sidebar—advertising as usual that you can follow them or friend them at those sites—but they’ve changed those icons to being in red shades, not the original light blue of twitter’s “t” or dark blue of facebook’s “f” etc.

I think I remember seeing grey icons for twitter and fb offered somewhere, and I would like to see any example of people using them in grey or other colors.