There seems to be a legal problem regarding the Drouin Quebec Church records and Ancestry's authority to offer those records. As a result Ancestry has pulled those records for the time being. This may or may not be permanent. Ancestry has not given any information out to its subscribers.
In the mean-time here is a link to the LDS Drouin Quebec Church records. Access is free; however, the years covered seem to end at 1899. I haven't checked out ever Church but those that I have end at 1899.
Also, these records are not digitally indexed. Most of the Church records do have their own index either at the beginning of the year or, more commonly, at the end of the year. I guess it is better than having no access. Here is that link...
The Ontario and Quebec Drouin Church Records are available from the Drouin Institute at http://imagesdrouinpepin.com/main.php but it costs. For 150 hits a day it costs $100.00 a year. A hit is when you actually look at a record and does not include a simple search result. The only problem with Drouin is that none of the records are indexed. Of course there usually exists an index for a particular parish and year in the microfiche record itself so it isn't all bad. The Drouin Institute also has a number of other resources such as the Loiselle Index and some notary records in full - most of these are 1800's early 1900's. They don't have any from the 1700's.
That's too bad. Luckily I got alot of info from it already. Still wanted to do some more. Guess it will have to wait now. Hopefully they will get this resolved.