Windows Phone 7 has an unique lock screen which shows the message and email count and also the number of missed calls if any. With WP7Lock, you can now get this same style lock screen for Android. WP7Lock is a free tool which brings in the same lock screen as in Windows Phone 7 to Android devices.
Although this is a lite version and customizations have been disabled, a full version should be available soon. This lock screen app is a part of WP7 Android Project which brings the WP7 UI and features to Android.
You can download this lock screen from Android Market.