The first step of starting with CloudContacts is the one of getting your cards into the service. You could physically hand Allen a box, like I did at the event. You could mail CloudContacts your cards. You could scan the cards and e-mail him the results. Or you could even, with a feature announced last month, take a picture of the card(s) with your phone and e-mail it in.
Once CloudContacts has your cards, the real work takes place, and the cards are entered into the system. I gave Allen my cards on Saturday and gained a login by Monday, so turn-around time is very quick. Upon logging in, I was presented with a page that showed the contacts listed by first and last name, company, address, and phone, just like you would expect from online address book services, including the one Apple features in MobileMe.
For me, the major test was downloading the 200+ cards I gave to CloudContacts, and then importing them into my Apple Address Book, which syncs up with my iPhone, Mail and most programs. It happened perfectly, recognizing potential duplicates I'd actually entered myself, and adding the rest. Now, all those business cards I was lugging around or running into can be sent to the big recycling bin in the sky.
The question is, now that the hard part is done, can Allen Stern and CloudContacts flip the data on its head and start to make a LinkedIn-like social network out of it? Will I in the future be able to see who else uploaded the same business card? It looks like the foundation is being laid for the service to become more than just a next generation address book. But even if it never does, it's already been a great benefit to me. You can find CloudContacts at http://www.cloudcontacts.com.