Yoav on OneCare blog —”if you are already a OneCare subscriber (or have an active free trial), you will automatically be upgraded in the next few days. And if you are a current subscriber, but decided to join the v1.5 beta anyway, you'll need to uninstall the beta and reinstall OneCare from http://onecare.live.com. By reinstalling the product, and reactivating the service with your existing subscription (by entering in your LiveID when "adding a PC to existing subscription") you will automatically receive OneCare v1.5 and won't need to purchase a new subscription. Also note that the process of uninstalling the beta and installing the upgrade will not count against your 3 PC subscription limit.”
Windows Live OneCare will be officially released on January 30, it’ill be rolling out to customers in Australia, Austria, Belgium, Canada, France, Germany, Ireland, Italy, Japan, Mexico, the Netherlands, New Zealand, Singapore, Spain, Switzerland, the United Kingdom and the United States on January 30th.
If you participated in the beta process over the past few months, you can expect a special offer via email in the next few days. Beta customers who tested OneCare v1.5 that take advantage of this offer will receive a year's service for up to 60% off the regular price.