Even the newspapers get it wrong nowadays. My father in law was a compositor at the Daily Mail for 40 years using "hot metal". He was a rough and ready South Londoner but he knew his grammar :)
I've always been uncomfortable with "Site Supporter" because donors aren't the only ones who support the site. Now you've made me uncomfortable with "Donor". Thanks a lot, James .
Lol. I don't care too much for the word donor, but I can't think of anything better. Ever though about using icons instead?