Dropbox.com is looking pretty cool so far. It syncs (good grief, I typed "sinks" at first! woe is my English) your files with any computer you download the client onto. Very easy to use interface. 2GB free, with a current promotion for an extra 250 mg for each referral.
If anyone's interested, haha.
U.S. Amazon's mp3 downloads service is great. Their search functionality is still lacking though. But the convenience of their service cannot be beat.
iPad. There are supposedly thousands of applications available for this. Can they improve the search functionality a little better? I just want to check out the free apps first... It looks slick, but I feel so constrained by the limited Yahoo Wi-Fi connectivity in Tokyo. I suppose I need to download videos and watch them on this. It's good for taking notes though.
iTunes seems to be sub-par software, and the iPod has a limited interface that I find frustrating. Surprisingly difficult to use - why do people think it's user-friendly? I want to delete songs from my iPod, but I guess this is too complicated a concept for the iTunes model of syncing.