There is a brief note posted by James Nichols on UOHerald.com about working being done on the ISP (Internet Service Provider) connections tomorrow (December 7, 2010). The work will occur from 7:30am to 11:30am Eastern.
The two shards that will be affected or unavailable are Test Center and Origin. The client patcher may have availability issues during this time.
Update: Everything is done.
Update #2: Looks like it was done ahead of Test Center getting Publish 69.