I've noticed that Corner Grill sometimes has a cask from Kichesippi. They tweet about it as well.
I was down on this place when it first opened but their featuring of local beers has made me a fan. Best beer selection on the Westboro strip of Richmond I'd say.
Arrow and Loon always has at least one cask beer. They also have the best Ontario beer selection in Ottawa, with interesting things from all over, all the time.
They're rightly commended for breaking ground for real ale in Ottawa, but the quality is hit and miss and the beer knowledge leaves something to be desired.
hipfunkyfun