"Store, organize, and share your education and research for free."
I've not used this, so not sure what it is like, but it looks pretty useful for some.
Great presentation with some simple advice for academics and researchers about raising their online profiles, using open access and some colaborative tools.
Released in February 2011, this guide for researchers introduces some basics about how social media may be of use and highlights some basic social media tools.
Not all of those mentioned on this list are that "new". Those I think that would be most useful to researchers:
For metrics/statistics - Argyle, TwentyFeet.com & PostRank
For content management - Trunk.ly & Storify
& for Twitter hashtag tracking - HashTracking
Want to write a novel in a month? NaNoWriMo is a great tool for those creative writers out there, but also useful for non-fiction writers as it allows you to easily track your word count.
Citation analysis tool for researchers to prove the impact of their research. Particularly good for people in the arts, humanities, engineering and mathmatics.