Google released version 2.2 of the Android SDK.
thi version has an API level equals to 8

some of the new features:
  1. Using Dalvik JIT (just in time) compiler which produces faster performance.
  2. the ability to store applications on SD card instead on phone memory as in previous versions.
  3. Application Backup API, enabling to store a backup of any application and use it on other phones.
  4. The browser java script rendering has became faster.
for more info you can check this link

or watch this video