After a decade of helping sellers list items on eBay, power seller software maker Auctiva is launching its own marketplace. Or, more accurately, it's launching a platform, named AMP, where anyone can create a marketplace. Auctiva and its partners have 500,000 products ready to be included in any store via its API (our new AMP API profile).
With Lemonade Stand, users can search for things to buy in a location-based manner, or add their own listings of things they wish to sell. The application is currently available as a client for Android, with a possible Windows Phone 7 version on the way soon as well, from a 3rd party developer that released an early version. Its Lemonade Stand API allows other developers to either code their own clients or use it in mashups.