Just so everyone knows (instead of making topics asking about logs)
They log complete information (username, IP, time, message-id, etc) for all posts. This is done for DMCA and SPAM complatins. Every NSP has to have the ability to track down who posted what.
They log the amount of data downloaded per connection, along with time, ip, etc. They do -not- log what groups you visit or what article(s) you download. This information is used mostly for accounting.
None of the above information is shared w/ anyone outside NH.
Source : newsbin forums