This plugin will allow your elgg users to suggest their widgets with with their friends by just clicking a button. The second user will get a notification about this and he can accept the widget by following the link in the message. Also this plugin will allow the users to fetch widgets from the profile of another users profile.

The great thing is that the widget will be copied from the first user to the second with all its settings. So you can use this plugin with your google gadgets/My html widget or any other widgets