The ride never ends!
Following last week's Nintendo Network maintenance, it appears there will be a second round tomorrow.
The Nintendo Network status page lists online play and leaderboards as down from 2 p.m. PT/5 p.m. ET tomorrow to 7p.m. PT/10 p.m. ET, and the eShops, Wii Shopping Channel and DSiWare Shop as all down from 1 p.m. PT/4 p.m. ET to the same end time.
Last week's maintenance produced only a stability update for the 3DS that had a negative effect on the homebrew scene, but it is rather unusual to have two large maintenance periods within such a short time frame.