Dropbox is so easy to use on a desktop, I use it on Windows, Mac, Linux and on the iPhone. The approval of the app took very long time but it was worth the while and I've signed up for Dropbox Pro 50. Download to the iPhone of favorites for off-line use even works on 3G, I really didn't expect this, thought that Apple would not approve this because of competition with MonopoleMe or risk of network congestion. Or "bad user experience", "user confusion" etc. Anyway, Apple seems to have changed their policy somewhat and this is very promising!