I donated...
 

I donated money to TFP and it doesn't say donor under my username. Why?

Because Halx has to do everyone of the Donor tags by hand.
He tries to get to them on a regular basis but sometimes he doesn't get to them right away.
Be patient grasshopper.

(sidenote:did you make sure your user name was included in the donation. Sometimes people forget.)

Thanks redravin! I see that it has changed now.