The following tag from Adobe's confluence wiki could not be supported when migrating to ForgeWiki:
{rss:url= http://weblogs.macromedia.com/mxna/xml/rss.cfm?query=bySmartCategory&smartCategoryId=41&smartCategoryKey=2F0CC3A7-EA0D-20DF-DCD1A4D83A0ACA69|max=8|titleBar=false|showTitlesOnly=true}
This embeds a portion of an RSS feed into the wiki. This would be a nice feature to support in ForgeWiki.
For this particular use case, perhaps they'll want to use our news tool instead of an rss feed, and then we do have a macro they can use to include projects' news/blog items.
This is a good general purpose feature though.