Central Desktop announced document collaboration, which is a pretty cool feature allowing collaborators to work on a document together using MS Office applications, thus preventing the "version hell", while keeping the document neatly stored on Central Desktop hosted servers.
They are not shy saying that they are going head-to-head with MS Sharepoint and Office 10 which offers similar functionaity, but requires an expensive upgrade. This positioning against MS Sharepoint and Office 10 upgrade is probably valid for small business, however unlikely for larger companies as IT departments will not relinquish their grip on data and existing Sharepoint installs.
I've been a fan of Central Desktop over the years, and am excited to see them bring a big feature like this to market.
See this video for details: