I often forget about City programming (especially skating) until it's too late. It just doesn't seem to be on my radar, but this year (thanks to Ottawa Start) it is! The 2010-11 calendar is available online at
http://www.ottawa.ca/residents/parks_recreation/programs/index_en.html. Online / touchtone registration for aquafitness and swimming started on August 9th at 10pm and for all other programs started on August 10th at 10 pm. In-person registration starts a day later. Be sure to have your family identifier and pin ready (they are free and you can obtain them by calling the city).