MobileMe is a new version of pretty established service from Apple, called .Mac. Essentially, it puts bits of information that are stored on your computer or iPhone, and stores them online for you. This works, because it means that both your computer and iPhone can sync themselves using the online version, meaning they are both up to date pretty much all the time.
At the moment I am doing this just with my calendar and contacts, and just with these services, it’s really useful. Say I put a new entry in my calendar on my MacBook: within 15 minutes it will be on my iPhone too, without having to plug the two together, or having to press any buttons. Excellent!
There’s more, though, which I am going to explore – including hosting files online, thus making them accessible from anywhere. This is through the web interface, which allows you to see your files, calendar, contacts and email (if you use the email address supplied with MobileMe – I don’t bother, personally). I am having a few problems with the website at the moment – it isn’t letting me log in, which is a shame. But the fact that the syncing works is great for me.
MobileMe isn’t free, and if I can’t log into the website soon, I am going to be pretty annoyed. The cost is about £60 a year, which I think is worth it just for the syncing alone.