NZtechfreak: Actually the Desire has been Rooted, only that didn't grant full write access, so more work is being done. It'll happen before too long, apparently the two main Android hackers are both packing the Desire these days, so I'd expect news on this front relatively soon.
Just out of curiosity, where did you get that information from? I check out xda frequently and can't find anything recent on rooting the Desire over there.
IF that is indeed the case I might hang off a while as a rootable Desire would be my first choice without a doubt.