MobileMe
I've been trying out Apple's MobileMe service (www.me.com) for about two weeks now for free and I'm pretty pleased with the service, which is still working out some kinks.
I lost access to my me.com e-mail address for about six hours at one point due to an outage (Google GMail users were also hit at the same time, though the two failures are unrelated).
That being said, I found the ablity to sync data across my work PC, my home Mac, my home PC and my iPhone incredibly useful. I'm already moved about 200 contacts on to the system with a few hundred more to go.
On the very big plus side, Apple just offered me a 60-day extension to be orginal 60-day trial period because of some of the rough patches in the newly-launched MobileMe service, which replaced its .mac service in July.
If you're looking for a secure, easy-to-use cloud computing service (i.e. where data is moved seamlessly to and from the Internet cloud to your client machines) I highly recommend giving MobileMe a try.
The service offers 20 gigs of e-mail / data storage and 200 gigabytes of data transfer a month. It allows you to host web sites as well as photo galleries.
