closing down today.
Zyb were taken over by Vodafone and unfortunately on their home page the URL of the new service is obscured in some browsers in some resolutions, see top right below! (nor is the info shown after you login):
So if you want to continue with Zyb here's the URL you need to register on (for free): www.360.com (actually http://www.vodafone360.com/). See Vodafone note on this.
If you don't want to sign up with Vodafone, here's a tip: as the zyb-import people (whose software enables Zyb contacts to be imported to Android mobile phones) kindly pointed out, my previous blog post has instructions on how to get your contacts into and, more importantly now, out of Zyb. My method's phone-agnostic, it's not just for Android cellphones.