I know not everyone has a membership at NEHGS's website, www.americanancestors.org, but if you do, there are some changes you should be aware of. NEHGS has updated their Barbour Collection index and included several new towns. My research town of Lyme is among the new additions. A transcript of the Connecticut vital records prior to 1870, the Barbour Collection is a starting point for searching early vital records. The Connecticut State Library offers a good history of the collection on their website: http://www.cslib.org/barbour.htm. The index is organized by town, so you may miss an ancestor living temporarily in another town or one whose birth, marriage or death was never registered. I've seen cases of births only being recorded in the town's baptismal records and never in the municipal records. However, if you do find someone recorded... you now know where to look for more evidence.
I took a few minutes to poke through the new collection and to compare it to what I already knew. Ancestry.com also offers a Barbour Collection. The search mechanism on American Ancestors
is a bit fussier. You have to be in the correct database to begin a
search. Once in that database, be sure to search only by last name.
There are no options for misspelling or name variants. However, the
results list is much easier to read. It's organized by name, event, and
date, with no additional information that might throw you off. I've
seen Ancestry.com try to record out of state events in the wrong location. Good luck!
P.S. Thanks to Barbara for pointing out the fact that Ancestry.com and AmericanAncestors.org use different indexes for their databases. You can read about her experiences on her blog at http://lifefromtheroots.blogspot.com/2010/02/surname-saturday-farnham-and.html As always, I'd suggest contacting the town once you've found someone on either database.