We wish him well, health-wise. A C-SPAN update, from a new press release:

Gov. Pataki underwent an emergency appendectomy early Thursday morning in Peekskill, NY. Therefore, Friday’s Politics & Eggs event with Gov. Pataki in New Hampshire has been cancelled and will not be part of “Road to the White House” this week.
“Road to the White House” will still include Gov. Pataki’s remarks from earlier this month in Sioux City, Iowa (as described below). In addition, Road will show Sen. Evan Bayh (D-IN) at two events last weekend with local Democrats in Cedar Rapids, Iowa. Sen. Bayh made a three-day trip to Iowa Feb. 11-13.