Does anyone know if the DirectAccess client is alreadyimplemened in Windows 7 Beta?If so, how can it be installed/enabled/configured?

You would also need access to the Server 2008 R2. I'm not seeing it, but my Win7 isn't domain joined so it may only be exposed when it's matched up with WinServer 2k8 R2?

Yes it is. You will need an R2 server and client like Susan was saying, plus have the DirectAccess role enabled and configured on the server, the GP settings applied to the client, a Public Key infrastructure enabled, IPSEC policies put in place, and IPv6 (native or via transition technologies such as Teredo, ISATAP, or 6to4) configured. We do not have a step-by-step guide yet, but info below should hopefully get you going in the right direction.There are more details on configuration here:http://technet.microsoft.com/en-us/library/dd392259.aspxhttp://www.microsoft.com/downloads/details.aspx?FamilyID=64966E88-1377-4D1A-BE86-AB77014495F4&displaylang=enNed Pyle [MSFT] - MS Enterprise Platforms Support - Beta Team

An IPsec client you could try is NCPsit released its W7 beta version earlier this week. You can download it here

We also released a DirectAccess early adopters guide today - contains more extensive setup instructions:Grab hereNed Pyle [MSFT] - MS Enterprise Platforms Support - Beta Team