There are many examples of websites and and downloadable online applications for storing contact details. It would appear that this market is primarily aimed at the business sector and the need to store vast numbers of contacts that could be shared amongst for example a sales team.
Here are some examples of online contact management:
http://www.plaxo.com This is the most modern and useful interface of all of the sites that i visited. Plaxo is the only site that did not appear to be totally business orientated.
http://www.hyperoffice.com/online-contact-management This site is typical of the address book sites that are readily available. The interface clunky and a bit dated to look at. It would seem that ease of use is not the top priority when dealing with the business sector and that focus is on the inter-connect-ability and power of the database.
http://www.infostreet.com/cloud-apps/address-book/ This is one of the sites that is using the new buzz phrase 'cloud storage' to entice users.
Other examples include: workbooks.com, beiley.com
