The first cities to transition over to Zipcar will be San Francisco and Columbus (Ohio). If you are in one of these cities, your welcome packet and new Zipcard should be arriving within a week. In January, Washington, DC, and many of the college towns will make the switch, followed by Los Angeles, Philadelphia, Pittsburgh, Portland, and San Diego. The final group, Atlanta and Seattle, will transition over in February.
Flexcar says (with good reason) that this merger is a benefit to members, as there will be "more markets, more vehicles, and enhanced technology" available. If you are a Flexcar member and didn't get the email shout-out, you might want to contact Zipcar/Flexcar and make sure they have your correct information on file. Times like these are when errors can happen, and it's good to be proactive and avoid them.