We have an alpha version of Litcloud here. It's still a work in progress, so please forgive us if there are bugs (and report problems here).
We will be launching a beta version of Litcloud in early December, with the full version going live sometime in early 2010. We have also be put together packages of RSS feeds of scientific journals.
If you would like to receive an email when any of these things happen, Go here and join our email list.