Louisville-based Keepio describes their service as providing a fast and easy way for you to track what you own with complete control of your privacy. You can also share and swap items and collections with your trusted friends on Facebook and Twitter without any transaction fees!
I would try to explain Keepio in my own words, aside from saying that I think the idea has great potential; but I'll leave it to KillerStartups  to do that. They did a great job of summarizing Keepio's key features:
Keepio  is a platform for keeping track of all your belongings. People can build up lists detailing their personal collections, and apply the privacy settings that they want to these. They can make their lists visible to all and sundry, or they can make them visible to just a selected handful of friends.
Keepio has recently been spotlighted on KillerStartups , TheNextWeb , InsiderLouisville , and Thrillist . Check out what all the buzz is about and be sure to join their Facebook Page  and Twitter  for many updates!
Today's Tech Deal: Ending today, Amazon.com offers a $3 MP3  credit for free via coupon code "GET3MP3S". (If you don't see a box on that page at Amazon, click on "Redeem a gift card or promotion code & view balance" on any album page to redeem this credit.) It applies a credit to your Amazon.com account, which can be used to purchase any MP3 of $3 or less in the Amazon MP3 Store. Of note, the credit expires today.
A best bet is Kanye West's My Beautiful Dark Twisted Fantasy for 99 cents  after discount.