Sync to HTC phones

I am awaiting the iphone but the only carrier in Canada is Rogers and from what ive heard there plans are going to be a little pricy for not too much. Telus carries the HTC touch and a few others and they are both free on a 3 year contract. Also monthly plans are the same price as Rogers but with a lot of unlimited on it. So does anyone know if there is a software out there so sync the adress book and calendar from a mac to HTC phones? I was looking at the new HTC diamond as well, Sucks that it runs on windows but its similar to the iphone which is all that Telus carries. So if I cant get an iphone ill be going with an HTC unfortunatly. So any software out there so sync them?