It’s best to first install the Office Communicator 2007 R2 Cumulative January Update referenced in a previous post here at SPDan.com here.

Once you’ve installed the Cumulative Update, Microsoft has the x64 Conferencing add-in available at:

http://office.microsoft.com/en-us/help/HA102368901033.aspx

If you’re looking to grab the x64 edition and don’t feel like scrolling down:

http://go.microsoft.com/fwlink/?LinkId=180490

While this may not seem that big a deal to some, it’s very helpful for those that live by their calendar synchronized through Exchange and need to plan LiveMeeting invites a day or two out for distribution to several individuals to collaborate on a project together or demonstrate a code release.

Bottom line, thank you Microsoft for adding the capability for those using x64 based Office 2010 Beta 2 the ability to use Communicator more seamlessly!