Hi Christine,
There is no direct equivalent for the 70-513 exam in the new set of developer exams. Exam 70-487 does include WCF as well as Entity Framework, Data Access strategies, and deployment considerations. Please take a look at the skills measured for this exam
here:
http://www.microsoft.com/learning/en/us/Exam.aspx?ID=70-487&locale=en-us#tab2. It sounds like this exam may not be right for you just yet.
You can still take any of the MCPD exams for Visual Studio 2010 through next July. The 70-513 exam covers WCF services in depth. This is probably a good fit for you. Here is the information about the 70-513 exam:
http://www.microsoft.com/learning/en/us/exam.aspx?ID=70-513#tab2.
Please note that Microsoft is offering a 2nd shot promotion. If you do not pass the exam the first time you can take it again for free! Please see the following link for more details:
http://www.microsoft.com/learning/en/us/offers/secondshot.aspx. You do need to sign up for second shot before you register to take the exam.
Good luck!
Mike
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