When I lost my Palm Treo 600 (just a few days before my contract expired) I was quite disappointed. Of all the electronic things I wanted to spend money - that I did not have on - my cell phone was dead last. I was going to dial that Treo right into the ground. But after not finding it for 2 weeks I needed to replace it and the cell phone covenience I was missing.
To make a long story short, I replaced my Treo with an 8 gig iPhone. Plain and simple: I love my iPhone and it's been awesome. However, soon after setting it up I did experience a significant disappointment. iTunes (the syncing software for the iPhone) would not run on Windows XP64 which was installed on my main PC. My work around at the time was simply to use my other PC (running XP) for iPhone syncing.
I am happy to report, however, that iTunes can run on XP64. I found a wonderful and simple set of instructions and links to make this happen. I am now able to sync and back up my iPhone using my computer with XP64 on it. I hope this link and referral will help anyone who was in the same boat as me.