I’ve been using the new 2.0 version, which adds a number of functions that will make it very useful for web workers. The contact information to be shared is shared as a profile, which is based on the data about you that you’ve probably already added to your contact list, but which can be edited. You can also create more than one profile, so you can easily choose what information you wish to share.

In addition, Bump 2.0 allows you to automatically connect with others on Facebook and LinkedIn, and follow others on Twitter. It’s possible to share contact details in only one direction if desired. You can also share photos, other people’s contact information, compare calendars and send invites. There’s also a chat function for communicating with people you’ve “bumped” in the past, although I haven’t tried this yet.

According to Bump’s FAQ, it requires that both phones have an active Internet connection, since it “matches” the two phones that are connecting through the cloud. You may also want to check Bump’s privacy policy.

The free Bump app is available for the iPhone, iPod touch, iPad and Android, and the developers say that other mobile platforms are on the way. And yes, it’s possible for an iPhone user to connect with an Android user. There’s also an API, which will enable users to do things like send money via PayPal just by bumping phones.

Of course, the idea of sharing contacts wirelessly isn’t new. I seem to recall that my old Palm PDA had a similar function. But the 2.0 version of Bump is pretty slick, and it will be quite useful once it becomes popular.

What apps do you use to swap contact details?

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Once you set up a free Retaggr account, you can add a photo, include your status that can be easily linked to your Twitter account to show recent tweets, and link to your blog and include the RSS feed to pull up the most recent posts in your card.

You can also include your brief bio or profile and an email icon and your contact number on your card. Again, think of this as your business card, but don’t worry – your email address is protected.

To really enhance your card, you’ll want to add in all of your sites, blogs, microblogs, bookmarketing, social network pages, and more and Retaggr will link to them. The card customization process also includes a Facebook badge and a way to add other widgets you’ve created. If you’ve got a FriendFeed account, that will actually speed up your customization process.

You’ll be amazed at not only how many links you can create in your Retaggr card to all the publishing, communications and networking tools you use (lots and lots of them), but also how Retaggr displays everything in a very clean and compact format. (See my retaggr profile card at the bottom of this post or visit my retaggr page.)

Your card is easily embedded through the code the site provides to you or via one of those tiny buttons that represents your card and leads to it when clicked on. What I love about retaggr is that it gives people a hub point for connection to you and also displays the breadth of your presence and participation on the Web. What I was a little confused about was that on the home page of retaggr, it says that it is compatible with WordPress, but I was not able to embed my card into this post (WordPress stripped out the code every time).

On the social networking side of retaggr, you can tag people you know in images anywhere on the Web when a site is retaggr-enabled, including your own. First, you can make your own site retaggr-enabled. Once you do this, any image you see on your site will have a little “tag” icon next to it. Click on it to draw a box around any person in the photo to tag them. This means that other people who have photos of you on their sites can tag them with your name. If someone tags a photo on their site with your name, retaggr notifies you and provides you with a copy and link to the image.

Your retaggr card can follow you around to any retaggr-enabled site so if you leave a comment, anyone can find you through your profile card. You can also save other people’s cards in your account and create your own contact database of cards.

If you’re looking for a neat way to display your credentials and links to your sites and networks, retaggr makes it easy. The more people who use retaggr, the more pervasive the connections and the greater its value as an introduction tool that integrates and shares more than just your name, title, phone number and email address. Old-fashioned business cards have nothing on retaggr.

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