HTC Dream updates???

Hey there. I have an HTC Dream with Rogers. I was wondering if there are any other updates for the HTC Dream. My firmware is currently 1.5. I've been seeing Froyo on the dream on youtube videos but i've read that it's not an official update. Has an official update been released???? Please help...I'm tryna get my Dream to be as updated as possible and try and switch my iphone friend to Android :p