This is from Allears.net:::
"At the Port Orleans French Quarter you can take an evening horse and carriage ride through the French Quarter and Riverside regions of Disney's Port Orleans Resort. The 30-minute carriage rides start in front of Boatwright's Dining Hall nightly. The first ride departs at 6 p.m., and the last ride departs at 9:30 p.m. Each carriage can accommodate as many as four adults or two adults and two or three children. Each ride costs $30 including tax. Cash and Walt Disney World resort guest room charges will be accepted. Early reservations are recommended, make them at the Riverside Marina near the main building. Carriage rides may be cancelled due to inclement weather."
I researched this earlier in the year and from the people I've spoken to it sounds quite nice. I haven't spoken to anyone who failed to enjoy it.