Mary Jo Foley reports that the next version of Microsoft’s client operating system will be more tightly tied with Windows Live according to a planning memo for Windows Live Wave 3

The memo — authored by Chris Jones, Corporate Vice President of Windows Live Experience, David Treadwell, Corporate Vice President of Live Platform Services, and Brian Arbogast, Corporate Vice President of Mobile Services — dates back to the summer of 2007. But it’s all about the future of Windows Live — and how Microsoft’s family of Windows-complementary services are going to get a lot more cozy with Windows and Internet Explorer.

Microsoft memo: Windows 7 and Windows Live to be even more tightly joined at the hip