You can safely embed any external HTML code on your pages. To guarantee maximum safety, HTML code is placed in a safe environment (iframe sandbox) to limit the possibility of cross-site scripting attacks.
E.g. to display del.icio.us tag cloud as generated from http://del.icio.us/help/tagrolls simply wrap the html code in a [[html]]…[[/html]] tags:
Note: previously [[html]] tag functionality was partly covered by the [[embed]] tag, which is now deprecated and aliased to [[html]]. This is why you might still find [[embed]] tag here and there.
If you want a new service enabled, please write to moc.todikiw|troppus#moc.todikiw|troppus or put your suggestion in our Community Forum.