Ancestry.com has updated their birth (1869-1909), marriage (1801-1926), and death (1869-1934) records for Ontario which are available for World Deluxe Members. I tend to use the Library Edition for my own research. So far I have found little of use for my own family trees. Especially for marriages. I suspect that what needs to be done here is to find the records (if they still exist) for the traveling ministers (mostly Baptist and Methodist) from before the 1840s in Upper Canada..
For those with Deluxe memberships it might well be worthwhile checking it out.
Ancestry.com has also re-indexed the 1790, 1800, and 1810 US Censuses.