I've been keeping my eye on Webdoc, Glogster and their ilk for a quite a while now. I'm pretty convinced that these web based, pinterest-like, media collation and commenting tools are the future of blogging.
Bespoke content management systems are nearly always just vendor lock-in. There, I said it.
Hopefully Google will index this and some hapless business owner will avoid commissioning a web agency to implement their website using a proprietary CMS.