Summary of other taxiway landing events I found, for comparison. Some may be similar to this latest incident at SFO.
USA
1983 Continental DC-9 landed on the taxiway at Denver (Stapleton). Frank Lorenzo, who was Continental's Chairman, was a passenger on board
2000 Harbor Air Flight 4506 (Cessna 208 Caravan) landed on Seattle's taxiway T (then called Taxiway C) instead of 16R, after a visual approach
2003 American Airlines MD-80 at Seattle landed on the same taxiway T instead of 16R, after shooting the ILS approach and transitioning to visual at 3,500ft AGL, visibility > 10nm
2004 Air Canada Jazz Dash-8 also landed on Seattle's taxiway T instead of 16R, despite the fact that a big X had been installed to mark the taxiway. Neither crew member noticed that they flew right over the X, and the pilots did not realize they had landed on the taxiway until informed by the tower.
2006 Continental 757 lands at Newark taxiway Z instead of runway 29 after a circle-to-land from the ILS RWY 22L. Night VMC conditions.
2009 Delta 767 from Rio to Atlanta landed on taxiway M instead of 27R in night VMC conditions. Fatigue was a factor as one of the three pilots became ill during the flight and the remaining two pilots had to fly the route without rest. The Captain (PF) had been awake for 22 hours when the incident occurred.
2015 Alaska Airlines 737 became the fourth commercial flight to land at Seattle's infamous taxiway T. Back in 2004 another Alaska 737 also nearly landed on this taxiway, until an FAA inspector riding in the jump seat alerted the pilots on short final.
Worldwide
1988 British Island BAC 1-11 at Gatwick landed on taxiway 2 instead of 08L after a night visual approach. A British Airway 737 was on taxiway 2 at the time, and veered off the taxiway to avoid a potential collision (but got stuck in the mud). The 1-11 stopped 190 meters short of the 737.
1993 Air Malta 737 also landed on Gatwick's taxiway 2 after a night SRA approach. The Air Malta crew thought runway 26R was 26L, and after some discussion convinced themselves that the pavement even further to the right must be 26R.
2006 TAP A320 at Sao Paulo
landed on taxiway B instead of 27R. Language may have been a factor as ATC tried to tell them to go around, but in Brazilian Portuguese.
2007 KAL 737 landed on the taxiway at Akita, Japan. Both pilots convinced themselves that the taxiway was the runway -- despite looking at the actual runway -- and concluded that the actual runway must be a "new one under construction". VMC with ceiling at 4,000ft and visibility > 10nm.
Interestingly, the Captain (PF) made the approach with a HUD, but on this non-precision approach the runway was not indicated on the HUD's symbology and Captain manually aligned the Flight Path Symbol to the taxiway instead of the runway.
2009 Ryanair 737
landed on the taxiway at Cagliari, Italy. Daytime VMC.
2011 Thomson 737
lands on the taxiway at Paphos, Cyprus.