The article is misleading. We're not radically re-architecting WCF. What we are doing is evolving our support for HTTP. This is a continuation of work we've started in .NET 3.5 and continued through 4.0. We are making signficant investments and looking to provide a more tailored HTTP experience. However, that does not replace work we have already done and we are absolutely committed to fully supporting and taking forward our overall WCF stack. At my PDC talk I will announce significant investments we are making across the board.
I posted a bit on this here