The service pack for the WSE 2.0 adapter is now available and now works with 2006 or 2004.Grab it today to start adding WSE enabled web services to your integration options.
Also, the fine folks at TwoConnect have created a WSE 3 adapter for BizTalk Server 2006. Given that Microsoft will not be creating an adapter for WSE 3, this is a great option if you need to support WSE 3.0 in your BizTalk solution today.