There's another thread I posted this question in, but perhaps a poll would get more response.
As has been suggested, an exhibition game in Ottawa would be wise in order to keep Ottawa fans included in the CFL. The 2008 Pre-season would obviously work, but they could also have one sooner.
How about a 2007 Post-season exhibition/consolation game?
Saturday before the Division Semi-finals (Nov. 10) between the two Playoff non-qualifies.
Saturday before the Division Championships (Nov. 17) between the two Semi-final game losers.
Saturday before the Grey Cup (Nov. 24) between the two Championship game losers.
The last option would seem to be the most meaningful as it would serve to determine 'third place'. It might distract from the Grey Cup itself though (and vice versa), plus maybe it is better not to ask teams that played all the way to the Championship round to play another game if it isn't for the Grey Cup.
I find the first option interesting since it would let teams that aren't in the playoffs have a chance to play a Post-season game, even if it is just for pride. Plus, having it first allows it to be a sort of 'Post-season kick-off' game (and they could market it that way).