I don't really like the asking-for-money thing, so I'll keep this short:
I'm doing the SF AIDS Walk again this year -- with the SF Goths, for the fifth year, I think? we get cool t-shirts! -- and am welcoming donations from any who are interested. You can donate online, with a minimum of $25. If you do that, I believe you get a receipt page to print out, and possibly an email. If you write a check (to "AIDS Walk San Francisco"), you don't get a receipt other than the cancelled check itself (and that's if your bank even gives those to you). If you don't care about receipts at all, you can give me cash or paypal me and I'll roll the donation into my own.
We now return you to your regularly scheduled narcissism.