Latest Android OS 2.3.3 Update: Screenshot Capability for All
The latest Android OS 2.3.3 (Gingerbread) update brings a highly requested feature to Android users, the ability to take screenshots without needing to have your phone rooted. Some may be quick to point out that there phone has been able to take screenshots already, or some apps have worked for them to take screenshots. But overall there is no official pure way of taking screenshots unless you use the SDK (for non-rooted phones), rather than being able to create them whenever you wish. And using the SDK means connecting your phone to your computer via USB cable.
Screenshots possible with Android 2.3.3 but Apps Need Updating Too
This has changed with the OS update to Android 2.3.3. Applications will need to re-write their code to take advantage of this, but if you are on Android 2.3.3 (as of this writing, only Google's Nexus One and Nexus S phones have it) you should be able to take screenshots soon!