you best bet is WNPI-DT on channel 23. Point your antenna in SSE direction.
As for getting CBC 25 (why would you want that??
), you're ahead of the game. Plan was for early 2006, then Feb. 2006, April 2006, June 2006, and now on cbc.ca/hdtv:
Ottawa: 25 (coming fall 2006)
From this, I read that it won't be until mid-December that we'll see the Leafs loose in HD OTA.