Sony Ericsson’s taking app promotion on Android a step further by introducing a new site called Mash-App. The site allows you to create a list of apps that fits a certain “category” that you choose. If you want to share the best apps you can think of for listening to music on the go, you can create a mash-app called “Tunes On-the-Go” or something less lame.

Think of it as the equivalent of Twitter lists, except it’s entirely for the Android market. You can “like” several mash-apps and you can explore what other people are mashing together. It’s a unique idea and a welcome ploy by Sony Ericsson to push everything the Android market has to offer. Get started by heading over to Mash-App.com.