I've seen a ton of sites doing this. Its definately OK. Ok, question answered someone close this thread.
Note that now it isn't even forbidden to have AdSense with any other contextual ads, if they differ in look from AdSense ads.
Donations, ads whats next a blood drive? Just kidding, you are fine using that format, just don't keep them to close to confuse them
Totally agree with this post. I'd suggest you adding more than 1 Donate button. Adding 2-3 buttons is ok.
yeah.. its entirely OK. but, just don't forget to place a separator between ads and the donate button.