I wrote a small SnapShots extension for BlogEngine.NET 1.3.

To install it, download and copy the SnapShots.cs file to the App_Code\Extensions directory.

To set your SnapShots Key, go into the Extension section of the Control Panel and click the edit hyperlink for the SnapShots extension. Enter SnapShot Key on the next page.

You can download the extension from the link below.  

Download: SnapShots.cs (2.00 kb) Updated 12/25/07

Update: There are two bugs in the BlogEngine 1.3 release related to Scalar Values in Extensions. I have submitted the patches to the BlogEngine.NET team. In the mean time, you can download the fixed files below:

Download: ExtensionParameter.cs (2.97 kb)
Download: Settings.ascx.cs (10.76 kb)