Free back up service for all or most of your cloud-based data. Works with Gmail, Google Docs & Calendar, Picassa, Twitter, Flickr, Blogger & Zoho. I use it.
Tumblr is a growing social media platform that is a bit of a mix between Twitter, a blog and something like Flickr (as it is normally associated with images or short videos). It is suited to multiple platforms and cloud-based. It is a platform that may suit some researchers. Another multi-platform blog along similar lines is Posterous.