The account news URI returns a collection of message objects that are of interest to a particular account.
While the /accounts/x/messages URI returns messages from an account, the /accounts/x/news URI returns messages *to* an account.
News is custom for each account, and is determined when an Ohloh user chooses to "follow" particular projects and people.
To get a paginated list of Messages of interest to a particular account:
GET http://www.ohloh.net/accounts/{account_id}/news.xml
The messages will be sorted with newest messages first.