How can I keep track of twitter usernames in Address Book?

I want to add twitter names to my contacts in Address Book. But I cannot find an obvious place to do so.

The best fit would be as instant messaging username, but twitter is not listed among the services. I there a way to add a service here? Does anyone know where they are stored?

I could add a new "twitter" label, but I can't stand the "AIM" or "Yahoo" behind it.

Any ideas are welcome.

Solution 1:

iOS 5.0 and Mac OS X Lion have native support for Twitter integrated into the Address Book app. On OS X, to add a Twitter field to a contact, select the contact and choose the Card > Add Field > Twitter menu item.

Solution 2:

Thanks to the comments on Ipacheco's answer, I ended using a new url labeled "twitter" with a format of "tweetie:@someone" instead of the http:// link to the twitter homepage. This opens up tweetie for Mac and iPhone (now named twitter) whenever you click the link.

Solution 3:

You could add an URL to the Twitter home of your contact and label it Twitter.