Quite by accident, I discovered that Ancestry.com is offering a good deal. I found out about it by going to their site to subscribe. Then today, April 24, I received an email about the offer. Perhaps others have also received it as well.
What the deal is, until April 28, 2013, you can get six months of the U. S. Edition of Ancestry for $49, or the World Explorer for $99. They are both for six months, with automatic renewal for an additional six months, but there may be a price increase. No one-year deal was offered.
I have not seen anybody mention this special, so I thought I'd pass it along. You can join me, because I took advantage of it and saved $30, since my previous membership expired in November. This deal is for new members only.
My Ancestry homepage shows the ad below, letting me know I can upgrade to World Explorer.