interactive business cards

Yes - that is a functional ECG - although not suitable for diagnostics it would certainly be an eye catching card for a cardiologist. Currently the card is just an awesome tech gadget created by the Hungarian startup MobileECG - but it could be yours! They also listed all their code if you want to try your hand at creating tiny tech
http://mobilecg.hu/blog.html
via: engadget

Dan Rose is a publisher and editor at Intersection - and while the company name is vaguely car related this looks more fun than functional.
via: Business Insider

As well as his name, URL, and telephone are hidden in the word search on this card for Jose Antonio Contreras. The list on the back serves as information for those not willing to put int he leg work.
via: Goodgraphicdesigner.com
 

This Australian furniture store's ingenious card pops into the iconic silhouette of the 1934 plywood chair designed by Gerald Summers. Designed by Richard C Evans. All the information remains on the card if you ever decide you want one of those big enough to sit in.
via: creativeboq

Tear and style as you will: it's a business card you will be sure to keep around because it will for sure make you smile. 
via: designschool

this will never get old.
via: shortlist

I see the relation, but it just seems like the people who need you the most will not be able to reach you! 
via: webdesigerdepot

One trainer is certain to make sure you work.
via: digitalsynopsis

Tamiya - a Japanese model kit company- is right on target with this Create Juice designed business card. Each card pops out pieces to create one of three potential mini models! 
via: boredpanda.com

Yuka Suzuki is giving away bobby pins and an amazing sense of play with her cards. 
via: creativeboq

Perfect marriage of unique design and targeted messaging - this landscape architect's deign literally grows with tiny trees.
via: Shortlist

TechKeys may just have the most advanced card I've seen. Crazy cool and way over my head - the card actually functions as a keyboard, which is perfect for a company that designs keyboards. Serious keyboards. As they say, "This PCB with on-board re-programmable ATMEGA16U2 improves upon the previous version making it even more fun for hackers, tinkerers, and makers." 
via: techkeys.us

It may not be practical, but certainly memorable. Like a secret agent the information for this grill only reveals itself when literally exposed to heat. 
via: designschool

Lego is awesome. And apparently working for them is awesome since the entire corporate world seems to be drooling with jealousy over the business cards Lego exec's get to hand out - personalized figurines of themselves with info printed on the shirt. I'm also jealous. 
via: qz.com

Yup - in case you got insanely jealous from the lego minifigs... EvilMadScientist.com is ready to walk you through a step by step guide to making your own interactive lego business cards. If you have a ton of time and money to spare. 
Make it here: http://www.evilmadscientist.com/2009/lego-business-cards-for-the-rest-of-us/
Or print your own with http://www.brickprinter.com/Pages/BusinessBricksandFigs.aspx