From the press release:
[…] The net result for all will be a universal and up-to-date address book that can be used at home, at work, and on the road, and which provides the accurate contact and presence information necessary for all digital communications. […]
Pricing and Availability
Both AOL and Plaxo will make the integrated features available at no additional charge to their subscribers and registered users. A public beta of the joint technology will be available from America Online, Inc. later this year.
Ooh! Does this really mean that AOL members can now get Plaxo for free? Or, does this mean “if you’re an AOL member AND a Plaxo subscriber, you get this new feature at no additional charge” — which is still nice, but not nearly as cool as a cross-sell partnership between AOL and Plaxo.