..it's because the space has had a mid-life crisis and changed its name. The top level community entry is now /community/netweaver-portal, so, for example, if you want to find recent blog posts about the SAP NetWeaver Portal, you should now use http://scn.sap.com/community/netweaver-portal/content?filterID=content%7Eobjecttype%7Eobjecttype%5Bb...
Of course, people who are still looking for content in the old location won't find this blog, but in case they're using the search feature, they might stumble across this.
