Here’s an interesting post (http://www.bluedoglimited.com/SharePointThoughts/ViewPost.aspx?ID=305) from Maurice Prather on SharePoint 2010 Web parts.

It seems that now your web part will be stored against the page if check in/checkout is activated against the page library in a WCM site.

Sounds useful as in previous cases if you exported your site the web part settings were lost. Now hopefully your web part settings will stay with the page during export or the web part itself will reappear in a previous page version if inadvertently deleted from the current page version.

The one thing I’m curious to see is if the page differences / web part differences are visible to the user from the SharePoint UI, rather than having to revert to a version and manually check for differences Could be a useful WinDiff add on for SharePoint.